Today was a big release day for a couple products:

Halo 2
1.5 million copies of the Xbox video game were pre-ordered, and walk-up sales will push its first day sales total to $100 million. 7000 stores opened at midnight just to sell the game.

Mozilla Firefox 1.0
Development editions of the Firefox web browser have existed for years, but Mozilla released Firefox 1.0 today, the first version intended for a full release.

So while Microsoft hopes to gain market share in the video game industry, its dominance in the web browser industry is slipping...