Summer Businesses for High School Students?

An anonymous reader asks: "A friend and I are going into our final year of high school, and given a variety of factors (the relative paucity of technology jobs for HS students, etc.), would like to start our own business. We'll probably have about $1000 in capital, but (in effect) start out with no other resources other than our own skills (technical and otherwise). We have no constant access to a car, which means on-site tech support is effectively out. We'd like to start something in the technology field (IT, software design, hardware construction - we can solder, web design, etc.), but are open to any suggestions. We'd also like some sort of business we can start this summer, but can continue to maintain. What do you suggest as a business idea for the summer->longer term?"