There's a thread on the Film and Discussion board (by kris, who writes for the site) acclaiming The Producers. Some later posts echo his sentiment. I'm no Producers zealot or a real fan but I think I have a good read on how people are reacting to it. Buzz leans more toward the positive side.
If you think Oscarwatch is some sort of pro-Rent forum, then you really haven't been following the threads closely!

I've been considered the equivalent of this board's fanatical Rentheads just in my mild support for that film. There was a positive review of Rent posted there today, but the general sentiment on the film is that it is/will be so bad or mediocre that it isn't even worth discussing. I hate to say this - but unfortunately some Rentheads have joined the board and don't make contributions to the discussions worth a damn. It is really laughable to see them there trying to censor opinions on a board that was essentially created for quick, sharp judgment of films. As much as I've been anticipating the film, I now kind of want it to open and close as quickly as possible just so that I can be spared any more idiotic Oscarwatch posts from Rentheads arguing that because Cinderella Man, The Producers and The Family Stone are "bad" films, Rent must win the Best Picture Oscar.
Fortunately, The Producers fanbase isn't very intense. Discussions of that film have been fairly sedate on Oscarwatch, even as some people have expressed their dislike of the trailer and the film itself.