Just noticed netters on Xbox LIVE Marketplace. Seems to be some XNA game (a trial and full game is available). WTF is it about? Letters and numbers?! I can't run it since I need a membership for XNA. So, I am pretty much guessing most of us will be locked out?

I don't know.

Yup, you need a XNA creators club membership in order to execute this. Hope nobody buys it and then cant play it.

There is also a game called Net Rumble, it was a game creation sample available with the xna software, it is also available online right now, same restrictions.