Well, if you appreciate the current work of MusicBrainz team but foresee the possibility of them going commercial, maybe you could, meanwhile, link or redirect to their official http://musicbrainz.org/ site. That could be a fair solution for non lucrative project domains.
A similar thing happened with freedb (hence freeddb), which ended up powering daz.com for a couple of years but with better replacements out there the project was shut down.
Funny how everybody is always so ready to see malice.
Check out reocities.com for one that did work out as planned (at least, according to me, I'm not sure Yahoo would agree with me there).