NMN sent us a somewhat lengthly email in regards to the Knee Deep in ZDoom (KDIZD) project. For the few of you who still haven't heard about this project:
Our main concept behind our project is the single tought-how would Doom look if ID had the power of the most felixible and innovative mod making-wise source port- Zdoom in 1993? Would our favorite game look like it looks now? Maybe it wouldn't look like that at all? We want to enter the minds of the creators of Doom and go back in time-we have studied their styles, carefully planned and laid down every aspect that would make our project look as much as what the great minds like John Romero, Tom Shawn, Adrian Carmack, Sandy Petersen would make if they had the chance.
Other than describing in detail about the project, he also mentions that they're gearing up for a release in 2005. There's no official homepage, but you can view the WIP entry.