Still says 17th on Apple Site.

Heres a link: http://appldnld.apple.com.edgesuite....1_Restore.ipsw

If you do upgrade to this, do it at your own risk ok, IM NOT TAKING RESPONSIBILITY.
Its the Gold Master used at the WWDC'09.

info taken from http://gizmodo.com/5293557/iphone-os...able-right-now
and http://discussions.apple.com/thread....42371&tstart=0