I've had a Palm Pixi Plus on AT&T since July, and I absolutely adore it. Best phone I've ever owned, hands down.(better then my 3GS I think) Wouldn't trade it for anything.
I bought one of these on Pay As You Go at the start of the month and I have to say that whilst I had reservations due to the truly awful Palm Treo Pro that my work provided to me, the Pixi Plus is a great little phone.
For £100 without contract, the OS is brilliant, the keys whilst looking fiddly are very easy to use, and on a phone so cheap, I don't mind losing some screen space for a good keyboard rather than a subpar soft keyboard.
I don't miss iOS applications, but that is only because I have an iPad. Although the music application in WebOS is really nice, much better than the music player in Android which just looks for every audio file on your phone.
The Facebook App is nice, easily the best on all the mobile platforms, multi-tasking and Synergy really make the platform. Hopefully with Skype too, WebOS 2.0 and whatever new Palm device appears next year, there will be less reason to get an iPhone 4S/5.