Shameless plug: Put this together based on CFBstat's '05-'12 historic 4th down data (just in time for the last game of the season!). Input yards to go, spot, and (optionally) quarter/score, get attempts %, success rate, and overall win/loss rate. STATS YAALLLL. Any questions/comments/complaints/etc appreciated.
I'm still trying to get a Kindle-specific version put out, but that process takes a while. But if you're dying to have Study Hall: College Football, Its Stats and Its Stories, wait no longer. It is now available for $8.99 at Football Outsiders!