Banjo-Kazooie was origionaly a Nintendo 64 game made by Rare. It’s still a Rare property (Rare is again owned by Microsoft), so the old N64 classic will hit Xbox Live Arcade on November 26, 2008. It will be 1200 points. (Source: Gamerscoreblog.com)
You can also see a lot of screenshoots on Flickr.
Kombo.com posted a news about a leaked video of Banjo-Kazooie. The 9 minute footage can be seen in the Youtube video below.