The Director's Cup is probably the best way to keep track of things like this - of course, it puts equal weight into all sports, but it's as good as measure as you'll get across the college sports landscape :
http://www.nacda.com...nt-scoring.html
Big Ten Rankings
Fall Sports (Cross Country, Football, Field Hockey, Soccer, Volley Ball, Water Polo)
#5 Michigan
#6 Penn State
#12 Ohio State
#14 Wisconsin
#16 Illinois
#25 Michigan State
#38 Indiana
#40 Minnesota
#52 Purdue
#61 Nebraska
#105 Iowa
#105 Northwestern
Winter Sports (Basketball, Bowling, Fencing, Gymnastics, Ice sports, rifle, track)
#2 Ohio State
#3 Penn State
#5 Michigan
#6 Minnesota
#10 Wisconsin
#15 Illinois
#18 Michigan State
#25 Indiana
#29 Nebraska
#34 Iowa
#37 Purdue
#61 Northwestern
Spring Sports - to be released end of June