Developers purchasing the OGL Designer’s Kit will receive updated pre-publication versions of the 4th Edition Dungeons & Dragons core rules through the time of launch
It provides three hardcopy pre-publication versions of the three core rule books, copies of the OGL and SRD, and a FAQ. Publishers will continue to receive updates to these rules as changes are made, one in the beginning of February and possibly one in March
I'm not sure why you're having difficulty with this one, K. There have been other recent statements too, where the devs are saying it isn't done, and hasn't gone to the publishers, and they still have final decisions they haven't made yet.
And here's a link from the 13th-
http://www.wizards.com/default.asp?x=dn ... [br][quote]
For the next several weeks, you’ll be seeing fewer 4th Edition Design and Development columns than normal. This is because the writers, all of whom are members of the R&D staff, are busy finalizing the Player’s Handbook, Dungeon Master’s Guide, and Monster Manual. As a result, we’re scaling back the number of online articles. Once the three core rulebooks are off to the printer[/quote]
As of 2 weeks ago, the books were still at WotC, still being finalized.
I fully expect them to muck up the typesetting and/or assume they can make the changes make sense without fucking up the typesetting. Which means, of course, half-assed abbreviated rules that don't make sense.