The backend here is now updated to WordPress MU 1.2.2. Some changes are:

1. XMLRPC security fix
2. Codebase is merged to WordPress rev 5509
3. Sidebar Widget is added to the core functions, with a short name “Widget” now
4. Code optimization to make things faster

Detailed changesets can be viewed here: WordPress MU trac (log from r951 to r999) and WordPress trac (log from r5109 to r5509).

The main developer of WPMU, Donncha , dedicated this version to his new-born baby: Adam . Congratulations to Donncha!