I imagine peak-oil will be very topical in a few years time. It is already quite a topic of discussion. And it will get more discussed as oil gets more expensive. Also a great site to develop. Do school kids do projects on things like this?
Could be a great info site.
I like Spockets.com as well but that doesnt mean it has any value, first thing that popped into my head was a Discount Store of some kind for people with Small Pockets, not alot of $ to spend...