Let's face it, the big name companies do not need a name like "Dungeons and Dragons" to help sell a CRPG. The cost of using the name simply isn't worth it to them. It is better for them, particularly in the long run, to create their own IP rather than license someone else's.
I don't know if anything is being developed as a DnD 4e computer game right now. I honestly suspect there is, but I would expect some sort of intro hype about it. The DragonAge site has been up for a while and the game won't even be out until the last half of this year. Basically, if something is being developed I am positively not buying it until after I see and hear a lot of feedback on it. The companies I would trust to do a good job on it would already have a PR site up for it.
The latest DnD offerings are NWN2 expansions and "Dungeons and Dragons Tactics" for the PSP. Let's face it, the former doesn't compare well with other available CRPGs and the latter is a travesty in terms of both design and implementation.
Personally, I don't think the DnD name is anywhere near as valuable in the computer gaming space as Hasbro/WotC thinks it is. This tells me that the companies willing to license that IP are not going to have a strong background making CRPGs.
That's my 2 cents (I typed up 4 cents worth but deleted most of it

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Patrick