I know about the few dollars off with mousesavers + UT, or ebates + UT ($2.50 back, I'm assuming that 2.50 per transaction?)
Anything better out there?
American Express has $30 off $150 on UT I think, it expires soon. Or you could do the dicounted target gift card to Disney gift card discounts and buy direct from Disney.
I've read somewhere on the Dis that people have been signing up for AARP to buy discounted tickets. Apparently, anyone can join AARP. You could search the boards to see if you could find the thread.