I am so glad to have followed your advice.
I am SO EXCITED!!! After calling back, holding for a mere 3 minutes and speaking with Madison, who couldn't believe what I'd been told, we have upgraded our previous reservation at the Wilderness Lodge to the following, for the same price:
9/20/08-9/26/08
Polynesian (My DREAM resort!!!) - Garden View
7 day Park Hoppers
Regular DDP
The savings on our original booking was a little over $400, but we had decided that instead of pocketing the cash (since we were still within our budget) we'd try to upgrade. And now we're at the Poly! The one resort I've wanted to stay at since I was 7 years old!