The countdown to the Windows Phone 7 launch event has started with Microsoft officially announcing:

Windows Phone 7 Worldwide Launch Event @ the NYC Microsoft Technology Center Monday 10/11/10

Monday, October 11, 2010 3:00 PM – Monday, October 11, 2010 4:30 PM Eastern Time (US & Canada) Welcome Time: 2:45 PM

The event will include:

• A five-minute keynote
• 20 minutes of presentations on Windows Phone 7
• An hour-long Q&A session and one-to-one demonstrations with staff from T-Mobile
• Also included a raffle at 4:30

While the official announcement clearly states T-Mobile, what has surprised many is that there is no mention of AT&T. It’s surprising also because there have been reports in the recent past claiming that AT&T would start offering Windows Phone 7-based devices starting November 8. In addition, the internet has been abuzz with rumors pertaining to a number of Windows Phone 7 leaks. As such HTC’s HD7 is also expected to figure at the launch event.