Oni

Bungie.net
Official developer's site. Features game background, screen shots, wallpapers, and FAQ.
http://www.bungie.net/Projects/Oni/

Oni - The Greatest Game Ever?
Fan site offering weapons descriptions, moves, and screen shots.
http://www.freewebs.com/oniworld/

Oni Central
News, links to previews, multimedia archives, and forums.
http://oni.bungie.org/

Rockstar Games
Official publisher's site. Includes game background, character biographies, weapon descriptions, screen shots, and movies. [Flash Required]
http://www.rockstargames.com/oni/