I am another iPhone convertee (word?). Had a 3gs though not a 4, and after rumors of the 5th generation being delayed, and constantly having to jailbreak, not update untila non-tethered jail break, slow down of the system, etc... Decided to finally jump for an Android.
Have always loved being able to customize and tweak my gadgets without the need for extra steps. While I know you can root for even more stuff, I haven't done so yet because just out of the box, I have all the functionality I want and use except for tethering.
Have only had my Atrix for a couple weeks, but I am loving it so far.