And THEN a person on dailymile recommended this program that will give you the BPM for all of your itunes songs! There is also an iPhone app that you can just play songs within a certain BPM range. Anyway, I downloaded the program for like $10, and it was so totally worth it. Now I have playlists according to my desired BPM depending on my pace, if it's hills, etc. Annnd it's all my music that I know I like and already own.
Anyway, if you're like me and love running with music, I have loved this app. If you're interested, it is found here: