An update on Bungie's website has explained more about the upcoming Halo 2 PC version, which will be released after Windows Vista is released which will happen approximately three days before the sun burns out. First, although the game requires Vista to play, it will not require the new DirectX 10 drivers, meaning one can possibly hold onto one's old graphics card for a bit longer. As a bit of a disappointment to many, PC players will not be able to go up against Xbox players online. Bungie cited multiple reasons, including new maps that the Xbox version won't have, and controls that have been tuned specifically to each format, making matches "lopsided at best."

Elsewhere in the Bungie world, rumors have begun cropping up about their old shooter Marathon coming to Xbox Live Arcade. In response, Bungie answer man Frankie had this to say:

Of course it's possible, it's just not on any current agenda. If it's any consolation, many, many people think it's a good idea.

My guess is that it's pretty likely to come out at some point. The question is just when.