beaTunes is on sale at 43% off with MacUpdate, but only for 24 hours. Actually, as of this post, there are only 21 hours left, so if you’re interested in purchasing it you need to hurry!
I’ve used beaTunes in he past to automatically detect BPM of all songs in my iTunes library and assign it to the metadata. It has worked flawlessly every time. With this deal, it’s only $19.95.