^
Truly open platform
tons of resources online via community,
awesome interface (each manufacturer adds their own touch. Even hacks out there to modify the look and functions to your need) comparing to the dated/boring iphone interface, heck, you can even imitate iphone's look if that's what you are after.
easy to unlock
full support of google apps (if you get a data plan you will know that the possibilities are endless)....
Flash on froyo
too many to list.
I'm gonna get iphone with my gf's fido dollar the first day and sell it on CL...