I assume they are waiting until the renewal deadline is up (April 7th) to see what seats will be available and where. I see on Gophersports.com that additional season tickets will go on sale June 15th. You might be able to get on a waiting list if you call the ticket office. I did last year, and it cost me $10 or $15.
Mine are renewed all ready! Can't wait. Sounds like you are gonna nab some seats for 2010, glad to hear there might be another MKE area Gopher making the drive up.