http://shitmyself.com isn't a programming board, but it seems conducive to intelligent discussion, and I've there seen posts about projects. It seems like it's still under development. (At least, I hope it is.) It's a bit clunky right now, but it has a few features that I like, such as PGP support and forum data download.
If you post a PGP clearsigned message, it'll be displayed without the ugly PGP metadata, but you can still download the raw PGP message, for independent verification.
The data download is a bit dumb right now. It seems that you can only download the whole forum data, e.g. if you want to do a full mirror of the site. Personally, I would have thought it more interesting if there were a way to select which items to download. Maybe I want to follow a particular author, so I would periodically check for / download new posts by that author. Maybe I only want posts about a certain topic, so I might want to get only posts with certain tags, or containing certain words or phrases. Also, if I want to make my own forum using compatible software, I'd like to have a way to not only mirror some sets of posts, but to be able to send copies of replies of mirrored posts whence came the mirrored posts, so that the source server can have a copy of those replies, so that any server that is mirroring a post and it's replies can have a copy of all that posts replies, irregarding from which server the replies came. i.e. I could reply R to a post P via server S, and all servers mirroring replies of P, would get a copy of R. I think it would be neat if there were (perhaps limited---it is turing complete, after all) TeX typesetting support, so that a post can be a TeX manuscipt, dispayed with nice rendering.