Playing on the web site I'd bet ya a donut that the web site is only accepting thu Feb 09 at this time.
There's lots open thru Feb 09 .... then everything 'looks full' beyond that....suggesting to me that it just hasn't been 'opened' yet....
Go to your desired June 09 date then scroll the cal' back. March April May of 09 all booked solid? I doubt it.... But Feb has a lot open....
Do note that some Dec and Jan weeks ARE full tho. I consider 6 months to be a fair lead time for DC, altho one could go next week too....
I'd give a call to see if I could book that far out that way....