For months, we and dozens of our partner companies have been laying the groundwork for the Windows Phone 7.5 update—and making solid progress. As a result, we now expect to start rolling it out in the next week or two. At that time, we’ll also refresh the Where’s My Phone Update? table to reflect the worldwide rollout status.
Place your bets on how Microsoft will actually deliver it smoothly, or repeat the previous "experience" and deliver the update over the course of almost a year.