+1 for Amethyst. Worth checking out. I don't know what the 4e-ish version will be like, and I'm not interested, personally, but I'm sure they'll put the same effort into it as they did with the d20/OGL version. So it won't be bad, I imagine.
Also, d20 Modern, especially with the supplement Urban Arcana, can do 'modern D&D', to some extent.
Postmodern: Fantastic Classes, by Big Finger Games, is well worth a look too, if you want to D&D-ify d20 Modern some more. Some of others in that range are good too, IMO.
If you actually just want to chuck D&D into the modern world. . . best of luck to you. You'll have a lot of work ahead of you, to make it work well.