Microsoft have confirmed that Mango, the long awaited, 500 feature containing update for the Windows Phone mobile OS will be here “within the next 2 weeks” which means we’ll see it between now and October 7th!
“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”
Some more info and advice from Eric Hautala over on the official Windows Team Blog:
“During the official Windows Phone 7.5 update process, every Windows Phone will also receive software from the handset manufacturer. This matched and paired firmware has been painstakingly tuned so your phone—and apps—work with all the new features of Windows Phone 7.5. Since your phone requires the proper firmware to function as designed, my advice is simple: steer clear of bootleg updates and homebrew tools”
Cloudy with a chance of Licensing 