[_frog]

iMessage should work fine, location based reminders on the other hand are iPhone 4 and 4S only.

[jayp08]

doesnt work for me..what do i do to make it work?? I cant see any option under messages for activating iMessage.

[zacharyz]

This makes me wonder how the majority of the people are even going to use it if it isn't immediately obvious how to activate it. I used this gigaom article to setup it up on my 3gs: http://gigaom.com/apple/ios-5-imessage/

It works pretty well and I can't wait for the mac version.

[kgermino]

Do you happen to know about iPad/iPad2?