I don't think so. I was waitlisted at WashU after applying for 2004. I applied again for admission for Fall 2006 (with better academic stats than I had the first time), and this time, they didn't even interview me.
However, I did get interviews from many other schools that didn't interview me the first time around. So hang in there...I feel your pain, but it's definitely easier the 2nd time around.