I was mistaken. Melodeon.net uses SMF - it is not a Yahoo group. There is a button accordion forum on Yahoo Groups, but I can't recall it's name.
In any case, the nice thing about SMF and phpBB is that they are both free for the software. The forum would still have to be hosted, but that is not terribly expensive.
I would sure hate to lose the thousands of posts in the archives of this site. Accordion repair tips, hundreds of lyric translations by Marc and others, links to old recordings. look up stuff in the archives on a regular basis. I guess this would all be lost if we switched to a different site. Yes?
phpBB and other discussion forum software allows for importing or conversion from other formats. But I don't know if the Bravenet format is one that can be imported or not. I'll see if I can find out.