While I'd love to have another low point destination like HHI and VB, I can't think of a single location compelling enough to make it my Home resort. If there were more points in our future, they would almost certainly be at a WDW-based property, and we'd take our chances at 7 mos elsewhere.
If we reach a point in our lives in which we feel the urge to travel throughout the country, it seems like Mariott or some other point-based timeshare would be a better match.
When folks hear "Disney" they think either California or Florida. It would take a pretty compelling destination to entice non WDW or DL fans to consider owning there. And, even with the addition of one or two other destinations,
DVC would still be a far cry from other more diverse programs available.
The 10 years it took to sell out 150 units at VB probably didn't help either.
I hear your pain, tvwalsh...I just don't know how many of us would be willing to do anything to bring it closer to reality.
EDIT: Along the lines of Show Shoe's post, Jim Hill Media had an article up about 6 months ago with details on a New York City project that came THIS CLOSE to getting the OK back in the mid-90s. Mike Eisner got gun shy, for a lot of justifyable reasons, and didn't approve the project.
If I remember some of the details correctly, the main reason was that the property was in a very bad location--which has since been revitalized. The project was also being considered just as Disney's Broadway show unit was starting to come alive. There was to have been a cash hotel and DVC units. When you consider the possibility of selling room / show / dining vacation packages to cash guests, it really could have been something.