The next scheduled release of Opensolaris is 2009.06. This will be based on snv111. I just recently upgraded to dev snapshot of Opensolaris. And i should say, this release is indeed great. A lot of nitty-gritties have been taken care of.
* The boot-up time has considerably improved. On my Dell Precsion M4400(intel centrino 2.5Ghz, 4 Gig RAM) – it takes 40-50 seconds to boot to the GDM login screen.
* The shutdown is an amazing improvement since the last releases – it just takes 8-9 seconds on an average.
* Comes with gnome 2.24 and firefox 3.1 beta 3
* Lot more packages in the IPS respository (last count 33987).
More updates to come soon.