Coding Horror: Easy, Efficient Hi-Def Video Playback
Great writeup on how to get low CPU Hi-Def playback for a media center PC, though you need a supported video card.
Boxee
Combines XBMC with social networking, Mac (and AppleTV) only for right now but a Windows version is planned for the future. (Terrible Flash website warning).
There was also a writeup on SAI and Crunchgear today. Their publicists must be working in full swing today.
Download XBMC in Different Flavors
I guess there are now official builds in Windows, Mac, and Linux
Windows Media Center SDK
I need to look into building a plugin that lets me do list view in Vista MCE because those thumbnails are just too dang slow.
Also check out the MCE Australian community and the Green Button
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