Looking for BPM tagger

Hi,

Can anyone recommend a tool that will create BPM (Beats Per Minute) tags?

Currently, I'm evaluating MixMeister BPM Analyzer
(http://www.mixmeister.com/download_freestuff.html).  This is a very
simple tool that seems to work okay.  But since I'm very careful about
my ID3 tags, I'd like to hear if anyone has experience with this tool.

Or experience with other tools that generate BPM tags.  Most important
is that it creates standard ID3v2 tags and does not mess up existing
tags.  The accuracy of the BPM count is less important; it must be
nearly impossible to determine the correct BPM in all cases.

Although the AT does not support BPM tags, I can use the BPM tags to
create playlists (using ID3-TagIt).

Thanks,

Stan