I've just remembered this amusing little thingy. Doom 3 isn't being written in Blitz 3D to be compatable with Windows Longhorn at all, plus the first port will be to XBox. It's being done in Blitz as it is easier than the current hybrid C++ code. The story goes: John E-mailed some code to Michael Abrash for an opinion (really hoping for some optimisation - as per usual) - Mike sent it back in Blitz3D code so that John would find it easier to do. John Carmack actually found it easier to use, the whole project got canned (this is quite early on) and the engine was re-written from ground up in an "optimised" Blitz3D environment - Mike basically had to re-write a lot of the Blitz3D engine.
LongHorn is being done in Darkbasic Pro, actually.
LongHorn is being done in Darkbasic Pro, actually.