2.50 final is going to be quite a while yet (not till July or later)
BUT there may be special Tech Preview/Peach Release. Release date is targeted for one month after peach rendering completes. A freeze for all features but the peach features in two weeks. After which bugfix mode only. (So probably no clouds or sky tools or deep shadows features )
According also to today Blender Dev Sunday Meeting Agenda :
A ‘peach release’ based on current trunk will be done.
LetterRip and BDiego will manage the release.
Release date is targeted for one month after peach rendering completes.
The Peach release sounds, well, just peachy! And I was pleasantly surprised to see the first cloth implementation already in there! Will Jahka particles be in Peach Release, or not until 2.50?