...there's a list of hotels in leuven on the following page:
http://www.leuven.be/showpage.asp?iPageID=1408..most of them are booked up by now, but I have friends staying in the 4 star hotel at the top of the list for the duration of the festie (i think thursday is booked up there, but the rest of the days are still available @ 140 euro per room/night, so depends on your budget...personally, 140 a night for a nice looking hotel seems like a good deal to me, and if I was going for a hotel I'd stay there...only I want to camp!)...