There are many at ZuneBoards, you can find them all here - http://www.zuneboards.com/forums/download-completed-games-174/
MOST (not all, I've been too busy) of the games at zB can be found here - http://www.zuneboards.com/forums/download-completed-games/38521-bundle-games-working-w-latest-zune-software.html#post352573
Feel free to look around the forums for anything more recent :)
Bolt, zB Section Staff Get all known games here - http://tinyurl.com/cfmjz8 PM me for actual link. SHINEDOWN FTW!