Shouldwegoforit.com 4th down calculator is officially live
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.