Just an FYI for those who like the vBook but don't read the Open Discussion board. We are about to reset the book and I have just posted an FAQ thread that explains how the betting will work - including pari-mutuel betting.
http://www.buckeyeplanet.com/forum/showthread.php?t=3572
http://www.buckeyeplanet.com/forum/showthread.php?t=3572