We've been talking about September 15th for awhile now as being the official date for Mango and this morning we had some solid news to confirm that indeed, the launch is close.

Now Microsoft's Joe Belfiore and Brandon Watson are asking devs to upgrade their apps ASAP using the v7.1 SDK--simply recompiling the app using these tools will enable fast-app switching (multitasking) for the huge OS update.

Of course, if Watson and Belfiore are asking devs to do this now, really stressing the timing, it can only mean the update is close. And we have an odd feeling that tomorrow will bring some official announcement on the matter. Stay tuned...

Read more at the Windows Team Blog