MacWorld UK has an interview with Peter Tamte from Destineer Studios up that's dated October 23, but nearly all the information in it is old.

They quote Tamte from as saying Westlake will start in September to work on porting Halo to the Mac. And they also mention Kevin Browne of the Mac Business Unit of Microsoft complaining about OS X sales. (Browne left the MacBU recently.)

Thanks Louis Wu at HBO.