It's been awhile since I've been to GameFAQs, but isn't there a rule saying that a game has to be complete before Walkthroughs/FAQ's will be accepted for it?
I have seen a few "incomplete" games listed there, so I don't think that's an official rule. I know that the site DOES have a rule that they generally only post commercial games, though. An actual quote from the site:
"GameFAQs normally lists only commercially released games, with a few exceptions for very popular non-commercial titles. "
It seems like they can be pretty strict when it comes to what constitutes "very popular" or not. For example, Linley's Dungeon Crawl isn't listed. So I don't know if DoomRL's chances are very good.
Still, there's no harm in trying. Go here to submit game data:
http://www.gamefaqs.com/contribute/submit_data.php?edit=newprodIf a lot of people request DoomRL, maybe they'll put it up. Don't everybody go at once, though, or it'll look like spamming.