I heard (from the official irc channel) that it's hard coded to never scan mp3 files. That was the main purpose I wanted it for, and I think it's wrong to hard code anything like that. I suppose it's a good lite partner to something like MSE, if it does now scan mp3s.
I tend to run clam-av on file servers and mail gateways for the obvious reasons. I like the software, it works quite well. I'm going to have to look into the mp3 block though, this just seems like a bad idea.
Well I heard that Steve Jobs puts subliminal messages in MP3s on iTunes to make you buy Big Macs because of a conspiracy by an international group of ......
You can set an ignore list (at least in the clamwin gui) by default a lot of data files (images, mp3s, avi etc) are set to ignore since they shouldn't be executed anyway unless your player is buggy
I've used clam-av as a mail scanner (combined with postfix on freebsd 5.?-8.2) and on my mac desktop and it's very effective. I can't see any reason to not use it.