If I can't give you current news, then I'll give ya old news! Kudos to Butcher (yes, kudos) for pointing out a Next-Generation article concerning Halo on the Playstation 2. In a nutshell, Bungie is listed, along with Halo, as being a prospective developer for the PS2, along with a few dozen other companies.
Interesting possibility, isn't it? All those billions of PS2 players, on bungie.net... and a handful of Admins to keep them in line. Interesting indeed.