Also, here's a basic FAQ, consisting of an assload of questions I've recieved over eMail and just some random ones you may be wondering about:
1: Q: How will Tom Hall's weapons be implemented?
A: That's really a question only time can answer. If XDoom nears completion before ZDoom 2.0.64 comes out, then we'll just hijack some Hexen weapons. Otherwise, we'll use ZDoom's new DECORATE weapons system.
2: Q: What version of Doom is this mod for?
A: Doom1, of course, to preserve the episodes system and just to stay classic, so to speak, since the Doom Bible was the original invisioning of Doom 1.
3: Q: I played the alpha you sent me via eMail... And I think it's great (or not). Will there be an XDoom add-on, or an XDoom 2?
A: Maybe

Please note that this FAQ will get alot longer as I get more questions in my Inbox, and maybe eventually I will post screenshots.