Aningan: I think that's impossible. There are legal issues afaik that prevents anyone from making a TBS game in the 40k Universe.
Crispy78: Is that a recent thing? There was that WH40K Squad Command game on the PSP / DS...
I don't know if it's a recent thing or not, but I've read the same thing. The reasoning most likely being that the multiplayer component of a PC turn-based 40k game could cause a noticeable loss in revenue by stripping away a chunk of board game players who'd find it more convenient to play online. I'm sure many players wouldn't trade a computer game version for the fun of putting together their own armies, painting them, and playing with friends in person, but it can be a fairly expensive hobby, so certainly some people would ditch the board game in favor of a modern video game version of it. I assume they don't worry about that situation as much with something like a hand-held game system that doesn't support the kind of multiplayer capabilities that a PC game would.
That's always been my assumption, at least.