Yesterday I bought a game off XBL Indie section called I MAED A GAM3 W1TH ZOMBIES 1N 1T!!1, and I think that it is the best arcade game I've ever played on the Xbox. It cost me only 80 points, and that kind of means it costs about £0.60 in real money. The music is excellent, the zombies are excellent and the whole game is excellent. Strongly recommended to anyone who wants to play a fun/pointless game for 'the larfs'.
Here's some gameplay footage:
Also, in two days, the year's most anticipated release is... released. Serious Sam HD. Gaw-juss!