I'm a bit picky about ensuring that all of my music has the proper tags in iTunes. I rip all of my music from CDs or purchase it by the album from Amazon, this provides good coverage. I then use Get Lyrical to add in lyrics information. What I'm missing is a good source of BPM information. I've tried various programs such as MixMeister BPM Analyzer to calculate the BPM of music, but they're never quite right (There is no way the entirety of Metallica's Black album is 128,000 BPM).
I've found a couple of source of databases with BPMs for music, such as BPM4DJs.com, but they don't have tools to access the data. Is there a database and tool that I can feed a set of tagged MP3s into that will automatically get the BPMs for songs (not some auto-calculated value) and tag my MP3s with the right values?