iOS 5 is now available for download through itunes 10.5
what’s new in iOS 5?
Notification Center -personalized news feed
iMessage -group messaging as well as photo, video, location and contact sharing
Reminders
Deep Twitter Integration-directly tweet from Safari, Photos, Camera, YouTube or maps,contacts.
open the Camera app directly from the lock screen
Reading List – safari
The iOS calender now has year view