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Despite what the title may suggest, it has nothing to do a with a college kegger.
You can read about the announcement of the new hotfixes here.

Excerpt from that announcement:
These are the fixes from between December and February while we were re-integrating the branches and could not produce hotfix builds.

The build number for the blackout hotfixes is 12.0.6303.5000. These hotfixes are also post SP1 and include everything that was in the post SP1 rollups.

WSSv3 blackout rollup
WSSv3 localized blackout rollup
MOSS blackout rollup