Not that anyone believed otherwise, but Microsoft admitted this morning at MIX'11 that the update process for Windows Phone 7 can be stifled by mobile carriers.  The Live Blog at Day 2 of MIX'11 in Las Vegas includes comments from a number of reporters that specialize in Microsoft coverage.  My Windows Phone 7 (running the NoDo update on an AT&T phone thanks to the intervening magic of technology pixies) is fantastic, but it's hard to recommend this train wreck to law firms as the mobilie solution for attorneys.  I'll take a wait-and-see-and-don't-hold-my-breath approach as we run through this firedrill again in the fall with the much more substantial "Mango" update.