Android is badass. It's what me and 187 both use. Much more customizable than the iphone. You can install all sorts of widgets, live wallpapers, scrollable widgets, customize your shortcuts/icons etc. If you root your phone, you can flash custom roms. I'm using Cyanogen 6.0 on mine.
http://theunlockr.com/how-tos/android-how-tos/ this website shows you how to root your phone, as well as, how to unroot it if you have to send it back for warranty service.
http://forum.cyanogenmod.com/ you can get Cyanogen here.
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