Why would they? The iWork update just uses iCloud APIs already in Mountain Lion. The developers have no need to test iWork, and I can't remember the last time Apple offered a beta of their apps. Messenger is the only one I can remember, and that's part of ML anyway.Yes, I was referring to iWork and the whole Documents in the Cloud in general. I'm assuming they'll release a beta version of iWork for developers to try out sometime soon.
Well, there were several updates to the DPs during that time as well. The full schedule for Lion was:Looking back on Lion, DP 1 was released on Feb 24th, DP2 on March 31st, DP3 on May 13th, and DP4 on Jun 6th.
So taking the time differentials, thats something like 25-45 days between releases roughly.
Mountain Lion DP1 came out on Feb 16th. I'll place my bet and say that the next preview wil come out at the end of next week.