I know with the student package, we're guaranteed at the least 6 home games that are not during Thanksgiving or Christmas break, though there are games at that time. I know they keep so many tickets for each game for the public to purchase. If I don't get a ticket to the UNC game on December 1 (my b-day ), I plan on trying to buy it through the public route. I could try buying two tickets for that, if you would like to come down for that.
I'm just a freshman, so I'm by no means an expert on this system just yet. I guess this is the first year that IU has done the whole ticket ordering process online. I'll keep you posted, and also here is this link from the IU athletics site.
http://iuhoosiers.com/tickets/0405mbbsingle.pdf
EDIT: Looking at that, that's probably if you wanted to buy a package. However, that does include buying the Ball State game at Conseco and the Kentucky game at Freedom Hall.