Looking up music in freedb without the CD?

I just switched from PC to mac, and figured it would be a great time to start organizing my music collection. On my PC, I used to use a tag editor / music player that would search FreeDB for the ID3 tag info for untagged mp3s.

When I try to do this in iTunes, it asks me to reimport the CD from the disc. I can't find any programs for mac that would do this, either.

Any suggestions?