New Features in iOS 5

Here's a list of some of the new features in iOS 5:-
1) Notification Center
- to view all your notification in one place

2) iMessage
- push message to chat across multiple iDevices

3) Custom Newsstand for all your subscriptions
- automatically updates your subscription with the latest issue

4) Better reminders
- better ui with location reminder

5) Twitter integrated right into the OS
- tweet directly from Safari, Photos, Camera, YouTube, or Maps. You can even add a location to any tweet, no matter which app you’re tweeting from.

6) Camera
- access your camera from the the lock screen and capture image by pressing the volume up button

7) Photo
- more photo enhancements without even leaving the photo app

8) Safari
- tab browsing, save a page for later reading and Reader lets you view web articles free of clutter.

9) PC Free
- sync across iDevices without the need of a PC

...and many more other features (over 200 new features). You can read about all other features from Apple's website