It looks like 3d Realms has finaly bit the dust, things seem to be confusing on the point of Duke Nukem Forever, Take-Two say they still have the publishing rights but havent been funding the development. i also seems that Apogee has been taken out as well which was re-opened recently but looks like its been affected by the parent companys demise as I have just read that Apogees emplys have also been let go.
Update: theres a nice little article on the development of DNF over at http://duke.a-13.net/ I particularly like the list of things that took less time to develop, one of my favourites:
World War II and the entire Manhattan Project. Yes, even the complete development of the atomic bomb took less time.