We've already had, and now the new firmware, which will bring Facebook, Twitter, and Last.fm to the console, is available for download today.
In addition to these services, Microsoft will be rolling out Zune Video, which promises instant-on 1080p video streaming as well as 5.1 surround sound.
We should note that Twitter, Last.fm, and Facebook will require an Xbox Live Gold membership ($50/year) and both Twitter and Facebook services require all users to be at least 18 years of age.
If you aren't a member of Xbox Live Gold, a free preview weekend will begin November 20, at 12 p.m. ET and run until November 23, at 12 p.m. ET.
For a sneak peek at these new Xbox 360 features, check out our video playlist above or.