Can either of those programs do a tag lookup, though? It was my understanding that they're really advanced tag editors.

The feature he's talking about in MusicMatch actually takes what tag information might exist, as well as how the file is named, and does a database lookup to see if it can find full tag information for the song. As he said, not 100% accurate, but usually pretty good.

I'd be curious to see any other programs that do this.