http://360.kombo.com/article.php?artid=12899
Frank has resigned to "work more closely with MS on the Halo franchise". I guess the Halo franchise will be alive and kicking in all sorts of ways. Halo Zero, Halo Wars, and perhaps Halo Waggle with a new Xmote, lol. Interesting farewell letter to Bungie none-the-less.