mxcl/homebrew — pull request #15770 by brandonblack (2012-10-30 22:15:10+00:00)
Title: Updating MongoDB to v2.2.1 (Stable) and v2.3.0 (Development)

In addition to the new versions, 10gen has dropped support for pre-built 32-bit binaries on OS X. I've updated the formula to throw a warning message with more information.