Details are still mostly unconfirmed - but talk is that a director of BoB's executive corp turned rogue, and booted all of BoB's member corporations from the alliance (thus disbanding BoB).
Goonswarm thugs are said to be pleased with this outcome.
Discussion thread (well, one of many) on EVE-O forums: http://myeve.eve-online.com/ingameboard.asp?a=topic&threadID=990387
This is possibly the biggest event to ever happen in EVE. With BoB out of the way (finally!) the resulting free-for-all to claim their former space will prove crucial in deciding the future shape of 0.0 politics and warfare.
