its on iTunes already.
Twitter is full of iOS 5 tweets now!

THE OFFICIAL IOS 5 THREAD
REVIEWS AND COMMENTS
NO JAILBREAK DISCUSSION

IT'S FINALLY HERE
NOW DOWNLOAD YOUR IOS 5
AND GIVE UR REVIEW

Download the ipsw file here

Apple announced just a few minutes ago the official release date for iOS 5: October 12th. iOS 5 is said to bring more than 200 new features to the platform, some of them like iCloud, Find My Friends or iTunes Match are really astonishing.

The Link
The Detailed Link



supported:
ipod 3rd/4th gen
ipad 1/ipad 2
iphone 3gs/iphone 4

some features:
1. Wireless Sync and activation
2. Notification Center
3. Greater Accessibility
4. Twitter Integration
5. Greater phone support
6. Enhanced email features
7. Enhanced contact features
8. iMessage between iOS devices
9. Airplay wireless mirroring
10. Enhanced camera control
11. Photostream
12. Improved Facetime features
13. iCloud
14. Calendar enhancements
15. Location based Task manager
16. Storage usage and clean-up
17. The Assistant(Siri)
18. Split keyboard for iPad
19. Video and music now separate apps
20. Custom Tones

thread directory:
page 1 - 31 : The waiting and trolling
page 32-55? : Download,Backup,Restore
page 55> : Review and discussion

Some features guide
iMessage
Notification center
More trick&tips

Can choose ur ipsw frm here
http://techie-buzz.com/mobile-news/ios5-ip...load-links.html

Anyway, if anyone noe is it safe to update to official ios5 now then after that jailbreak it with untethered release plz do help clarified for new apple user