BP Labs is a cool new plugin written by core developer Paul Gibbs for the purpose of testing out some new BuddyPress experiments. Paul recently announced BP Labs 1.2-beta-1 which begins testing for Akismet integration for the BuddyPress activity stream.
The BP Labs 1.2-beta-1 includes:
Added caching to @mentions autosuggest; it speeds up multiple requests for the same query
Added Activity Stream Spam experiment