I don't have a good RSS reader (though I'm interested in hearing responses - I just bookmark reader.google.com and use it in the browser), but I figured I'd respond since you and I are in the same boat wrt just switching over from WebOS in the past couple weeks. I had a Pre for a couple weeks before switching over to the Optimus S as well. Lots of things I still miss about the Pre (esp app switching), but I'm totally loving the Optimus Android experience.
Well, let me qualify that: I've figured out how to change a few things which then made me love it. One was the keyboard: I tried out Better Keyboard, Swype, and a few others, but finally went back to the Android stock keyboard. The settings I found were most useful were: Settings > Language & Keyboard > Android Keyboard, then:
No vibrate or sounds (better battery)
No popup on keypress (I might be fooling myself, but the keyboard seems more responsive and I don't miss the popups)
And then all three "Word suggestion settings" checked.
Now I can type along and it does a pretty good job of getting what I want, at least good enough that I don't fell like trying out any other keyboards.
If you don't mind rooting, I heartily recommend Drew's CM7 build. Frees up space, phone seems snappier (yet no overclocking) and very stable (no freezing).
Hope you like your new phone!