Mark your calendars now: we got the official invite to “celebrate” Windows 8 and the Microsoft Surface later this month in NYC! It’ll be an all-day event on October 25th as (presumably) Ballmer and team introduce us to the new Windows operating system that will also be powering a lot of the new smartphones coming for the holiday season (like the HTC 8X that we are very excited to get our hands on).

But perhaps the most interesting part of the day will be the launch of Surface, Microsoft’s long-awaited competitor to the iPad. We’ve talked before about how this is a crucial move for Microsoft as they try to catch up in the world of mobile devices, and we’ll all be waiting to see if Windows 8 seems like a real competitor to the more established mobile operating systems, iOS and Android.

There’s a lot riding on this event for Microsoft, and luckily we’ll be there to capture it all right here on the blog and of course on the smallbizgomobile twitter account.