The 10%
DVC discount at the Disney Stores applies only to merchandise. It never applied to things like ticket media or Disney Dollars.
However, posters have reported that occasionally in the past, some
Disney Store CMs confused the DVC discount with the Disney Club discount. Thus, DVC members were able to puchase DC-discounted tickets with only their DVC membership. Since the DC is ending 12/31/2003, it is unlikely that this will continue to happen (and by now, most Disney Store employees should know the difference, anyway).
I've found that the best available discounts on park hopper tickets can be obtained from some of the online ticket brokers. There are several legitimate brokers that sell Disney admission media (with Disney's authorization). For more information on those, check out the Budget Forum,
www.MouseSavers.com and/or do a search on the Budget Forum for Paramount travel.
There are not been discounts on APs/PAPS except for the Disncy Club. I don't look for any discounts at all on the annuals, beginning 1/1/2004.