"'Every time I do this presentation I have to check what the new figures are,' Sullivan said, before rattling off up-to-date stats such as Xbox Live has hosted over two billion hours of gaming, including over 500 million games of Halo 2. It also handles over 900,000 voice and text messages per day. But there's plenty more where that came from, with Microsoft on-track to hit its target of six million Xbox Live accounts in 2007.
On Xbox Live Arcade:
". . .on Arcade (which is used by 65 percent of connected users), over five million games have been downloaded. Conversion rates between free content and paid for downloads currently averages around 21 percent, with top games such as Geometry Wars and Uno up at 50 percent, while the lowest conversion rate is around 10 percent."
It should be noted that even %10 percent is a substantial improvement over casual PC games, which average 2%. Sullivan also covered many other topics including Live Anywhere, in-game ads, and XLSP -- a tool that allows third party developers to integrate their own servers with Xbox Live.
I think this Xbox Live thing might be going somewhere.