Hi,
Just wanted to drop a note about XPong360, a PONG clone I've written in XNA. It's a full game and covers things like game states, menus, 2d graphics, 2 player gaming, support for multiple controllers (Keyboard, Game Pad and WiiMote (!)).
The game is available at http://jonas.follesoe.no/PermaLink,guid,222e39f7-7803-4f6d-a36e-36660c6686c1.aspx. I've allso posted a YouTube video showing the game: http://www.youtube.com/watch?v=ehnaKRHixlc
Hope you like the sample!
- Jonas Follesø, http://jonas.follesoe.no