I was just looking at my 2009 copy of the BE's form 990, and decided to check GuideStar to see if they had the 2010 form yet (as they hadn't as of a few months ago.) Lo and behold, it's there now.
Want to know why the Big East is about to die? Let's use UConn as an example, as there are few athletic departments more skewed towards basketball over football than UConn. However, UConn barely made less than 100k more for basketball than it did for football. Football, now and forever, is the television revenue king - even in a conference like the Big East that tried to marginalize football at every opportunity.
Digging around GuideStar for info on non-profits can be hit or miss, but occasionally there is informative stuff; like the BE return, Big Ten, ACC, or page 52 of Syracuse's.