The classic PC game developer 3D Realms closed May 7, 2009(just days ago) because it couldn't get funding for further development of Duke Nukem Forever.
Take-Two owns the rights to Duke Nukem Forever, but it still may never release, sadly.
I just learned of this about an hour ago, and I say this is awful. I didn't play many of their games, but I can see that their games are classic, and that they influenced the early PC gaming market significantly.
The day they went down they released(in what may be their last post) an image of the whole team on their website, along with the message: "Thanks for being fans and for all your support."
To see it, go here: http://www.3drealms.com/
To read the Good Old Games article on 3D Realms' demise, go here: http://www.gog.com/en/editorial/in_the_memory_of_3d_realms/