GameSpot has posted a Halo PC update, based on the Gearbox workshop at the CPL event this past Saturday. They describe the work involved with porting the engine and what Gearbox is working on. The Adrenaline Vault has a brief article of their own.

Pitchford said that the project is about 40 percent done, much of which includes a successful port of the graphics engine. The port required Gearbox to move to supporting DirectX 9 and completely rewrite all the pixel shader effects. Part of what that rewrite means is that the PC game will have some enhanced effects for PCs with the latest graphics cards ...