A fellow alumnus at my school created a website where people can ask for and grant wishes: Wish Upon a Hero. The site was launched last October and already 83,000 wishes have been granted. Wishes are diverse, from stickers to diapers to clothing to money and food. One person requested a donation for -- and was granted! -- LASIK eye surgery; there's such a huge variation of wishes to be granted. I think the popularity of this site is because you can help people directly and choose/know exactly how they're benefiting.