Battleground: Halo spotted an interesting tidbit in the latest issue of PC Zone:

Our guess is that Halo for the PC will be out next autumn, probably to coincide with the announcement of Halo 2, which is already being worked on and a cert to arrive on Xbox first yet again.

Before you get all excited, this statement has no credibility. Don't believe it simply because it's in a printed magazine; they're very often wrong.