http://htpcnews.com/ - "online resource for the HTPC enthusiast"
Front Ends (Graphical User Interfaces)
myHTPC - http://myhtpc.net - after installing Media Center Deluxe bundled with my MEGA 180, and promptly uninstalling it, I tried this little app. It's simply amazing! No multimedia PC is complete without it...
Xlobby - http://www.xlobby.com/