I'm actually interested as well, everything I've heard is how timeshares are such a bad investment (if you should call it such a thing), how they're impossible to load w/o practically giving them away, that you are essentially paying for lodging on your vacation up front, rather than "paying as you go".
It can't all be as bad as people like Clark Howard make them out to be, can it? I get the sense from him, the only time to buy a time share is if you buy it 2nd hand from someone at a steep discount and its a time share to a place you'd regularly be visiting annually anyways.