Update 6

Build 23 has been promoted, so far there is at least one build bug found (see 6624808 or this openjdk build-dev email). But these sources will be used pretty much 'as is' to start the Mercurial repositories and Build 24, of which experimental repositories are available at: http://hg.openjdk.java.net right now. The control directory disappears and it's Makefile is made part of the enclosing repository. If you have the Mercurial forest extension in your Mercurial installation, you can simply:

hg fclone http://hg.openjdk.java.net/jdk7/MASTER

And have your own forest clone of the OpenJDK to play with.

Also see OpenJDK forest, OpenJDK Integration Wheel, and Working in a Mercurial World for more information.

We are in the final lap... "official" repositories are very close.

-kto