the new PR 2.0 firmware for S^3 devices has been leaked on chinese forums.
So far it seems to be legit, the real deal.
The speculated release date for PR 2.0 is around the end of August, so we will see if this will push Nokia to out it a little sooner.
Here's the general response from people who have tested it:
The User Interface is faster and more responsive with a loading icon for programs
Conversation mode in sms works
UI changes in MP3 player
Web browser performance is still lacking
Social Networks app uses same old code base
No Split Screen in browser or in Ovi Maps
This will be interesting to see how things go.
UPDATE: the new firmware should fix the purple tint problem some people were having. Also, here's a video demonstration: