We've known that Oracle is to make some Solaris / OpenSolaris changes, but all signs have been that they would move forward with the OpenSolaris 2010.03 release in March as planned. OpenSolaris 2010.03 will supersede OpenSolaris 2009.06 that was released last June.
OpenSolaris 2010.03 is to be based upon a revision to OpenSolaris Build 134. A preview build of OpenSolaris Build 134 was made available at the start of this month over at Genunix.org, but no new builds have been made available since -- either for OpenSolaris Build 135 or the 134a that the final release will likely be based upon.
There's still a few days left for Oracle to deliver this release on time, otherwise we may be looking at OpenSolaris 2010.04. We are awaiting official comment on the matter.