I think the problem is that they do not yet have their rates in the computer or the booking engine for 2009. You can call their toll-free number to see if that is the case: 1-877-8200668.
Hi, I just booked a car from October 3 - October 16, 2008 and had no problems. I received my voucher confirmation too.
I once had problems with their site and emailed them, and they quickly responded. The problem was with the end user (me)! Anyway, they were very helpful.