Here's another option for adventurous souls:
Tag&Rename on the mac using
Darwine for OSX.
While doing a search to find some new tag editors, I came across posts describing the successful use of Darwine and Tag&Rename. I had used Tag&Rename to edit the tags on my mac using pc emulators, but the usage was always clunky and tended to freeze. Plus, I had to install windows and deal with all the pain that the windows os brings with it. (That's why I have a mac, right?)
This time installing darwine and getting Tag&Rename up and running was much faster. I simply installed a Darwine build for OSX, found
here and then downloaded the installer for Tag&Rename
here.
So far it does a great job at those mass tagging jobs I always end up doing to get all my tags and file names consistent. I tried to drag and drop an image from the mac to apply the album art, but that didn't work.
I'd be curious to hear other folk's experience with this option.