I have been on my DX for about 2 months now and I don't miss my S1 AT ALL! My wife has a S1 and I hate using it, even when it is just to troubleshoot a problem she is having. By comparison, it is like having to use an original IBM PC (1MB ram running Win 3.11). OK, not that bad, but really like running Win2000 on a 512MB, Pentium 4 PC vs rocking my current Win7 Ultimate, 8GB, dual core laptop. Just no comparison!
Anyway, some quick tips for those of you who have converted and looking to get the most out of the platform while getting close to BB mail and calendar (EVERYTHING else about a DX is just too far ahead of RIM to compare).
1. Update the OS to Froyo (Android 2.2)! Press the upward pointing arrow at the bottom middle of the screen to pull up the applications list, scroll down to Settings, click it, scroll down to About Phone, click it, click System Update. Update baby!!!
Better speed, battery life, and the availability of MANY other features! You will have to reinstall many (most?) apps from the market, so plan on doing it over the weekend to allow enough time to get things back to normal.
(NOTE: If you get a message that the Update Server is down, try again, you MIGHT have to do a Factory Data Reset to get it to work. Try for a couple days before going through various backup procedures. I like using LookOut and Astro File Manager for this... I had to do a FDR to get the update to work. Oh, many VZW store reps will tell you, "You have to wait for it to roll out!" They are wrong. That is they way VZW USED to do it, but with the Droid X Froyo update it is directly available IMMEDIATELY via the System Update for the first time.)
2. NOW, download Google Voice from the Market. Go to YouTube and look up the Official Google Voice Actions videos from Google (you want the ~30 minute presentation). WOW!!!!! Oh, with the Voice Actions, try a Voice Text! COOL! All voice recognitions happens on Google server farms! Very good. As close to a "Star Trek" voice experience as is available today!
3. Plan on dumping the default Google email applications ASAP. Even on Froyo, they don't compare to BB. Depressing, but reality. Heck, from all accounts, they don't compare to the iPhone (iOS4 or later). Try MailDroid (what I use now) or K-9 Mail for the most BB-like email experience on the Android platform. The MailDroid Dev is extremely responsive, truly a breath of fresh air compared to RIM! K-9 Mail's devs are also supposed to be pretty good. Look for the respective support threads here for additional information.
4. If you miss your "Today" view on the BB, get the Simple Calendar Widget. It provides a view of the next 6 events in your calendar. IMO, the best, most battery friendly calendar widget (free!) available!
5. Download Calendar Snooze immediately, if not sooner. While it does have a couple quirks, it really makes the Android calendar alerts much more useful! Very customizable and the dev is pretty responsive via email!
6. DOWNLOAD Juice Defender and you will see your battery life soar! Definitely a top 5 app download for ANY Android device.
7. Try Dialer One. It is a call log add on (you can play with it when you press the phone icon to make a call and eventually make it the default view, if you like it). It allows call log sorting and grouping by user (i.e. you don't have to look at 10 different calls to the same user, just one listing) and can order them by most frequently called! HUGE help for me!
8. TapaTalk for accessing forums. A bit confusing on how to set up, but well worth it if you are a forum addict!
9. Oh, WOW! How could I forget?!? At least TRY an alternate keyboard from the default!!! There are many, but FIRST try the built in Swype! (Settings, Language and Keyboard, Default Keyboard (or some such, I don't have my phone in front of me right now), change the "trail" to longer). Give it a week. You will wonder how you lived without it. It makes having to type a joy. Really. Try the tutorial! AND you can still "thumb" it if you like/need to (new words/passwords/email addresses (email addresses can be learned in Swype))!
Swype is SO much better than ANY BB (touch screen or keyboard) after you get used to it, it is mind boggling (at least to me)! Also check out SwiftKeys (for those of you who are die-hard "thumbers") and SlideIt (a (better?) Swype, but a pay for app). Oh, Google is supposed to have bought BlindType (was in an unavailable beta on its web site with demo video). I think/hope it will be available in Gingerbread (Android 2.3 (3.0?)). Looks cool!
10. GAMES! To keep the kids quiet on trips, of course!
11. Froyo enables loading apps to your SD card. Don't know why you'd really need it with the built in 8GB of flash, but it's there. Personally, I'd just recommend getting the available 32GB Micro SD from VZW and use it for music/videos ($99, but you have to push them to look for the Droid X "special" rather than the regular $149, I got mine two weeks ago, WOW!), but that's just me.
12. Try a replacement (free or paid) camera app. They allow more freedom in taking pics. You are stuck (for now) with the default video.
13. Try a couple different Brightness apps for increased range in adjustability of screen brightness. Helpful to not get overwhelmed when viewing in the dark.
14. Try gReader as your RSS feed reader. Once set up, it is like the better BB RSS feed readers.
15. Really start rocking the 7 screens of "appable" space! Delete anything you don't use and organize them to your heart's content! I have (from "left to right") Games (2 pages, again for the kids

, Everyday Apps (texting, etc.), Home screen (with Simple Calendar Widget)
16. Avoid widgets and live wallpapers unless you have regular access to keep your Droid plugged in. Widgets CAN, but do not always, drain battery. Especially weather widgets.
17. OH! There are apps available for even non-rooted phones to hook up a bluetooth keyboard for those of you who want to rock a full-sized keyboard in appropriate locations!
18. Consider rooting your phone. You can control what apps start (AutoStarts app) to control memory issues, "free" wi-fi hotspot if you want to void your Terms of Service, and many other benefits, check out the forums for more information!
19. Finally, get the extended battery. It offers 20-25% better battery life for only ~$40 (after "long-time" VZW 25% discount) delivered. Use the extended battery door. it CAN use the regular door, but you will notice screen ghosting because of the pressure after awhile. Even with the extended door, it will still fit many cases. I only hope that a 3000+ mah battery will become available soon like on the Droid Incredible. You know, because the kids keep draining the battery because of games/videos. Really! No, I'm serious! THEY do!
Anyway, that ought to get those of you who have just stepped over up and running. Hey, with over 70,000 apps on the Market (compared to <10,000 in the BB App Store), this is just scratching the surface, so dive in. It is SO worth it!
Scott