Xbox Live Arcade has to be one of the greatest things ever invented. Today I have spent hours with a friend playing various XBL Arcade games. The system is just so well done. I just love how easy it is to browse the available games, download a demo, play the demo, and then buy the game if I like it. The library of games in the arcade is pretty good. I have been playing Marble Blast Ultra, Uno, and Geometry Wars quite a bit lately. All of those games are just so incredibly addicting even though they are so simple. With games on the way like Street Fighter II Hyper Fighting, Ultimate Mortal Kombat 3, Sonic, and RoboBlitz I am sure I will continue to get a lot of use out of the Live Arcade.