DankStar
Her Little Mojo Minion
I was poking around and found this, a delay and frequency counter. You enter in the BPM, and it calculates the various delay options for working it into the song and having it bounce back and sound good:
http://www.tomhess.net/tools.php?ACT=delcalc
http://www.tomhess.net/tools.php?ACT=delcalc