Notes 4 Uni is a virtual marketplace for students to buy and sell lecture notes and other revision materials. If you make detailed, useful notes, why not make some money by selling them to other students? Or if you are looking to get ahead in your course, try reading the notes uploaded by others taking your exact modules, at your university.

Not sure that's going to work as a business. Students are usually pretty poor. If they have written bad notes then they'll just copy their mates' notes or ask the lecturer for help. They are not about to spend their beer money on notes that may or may not be relevant to their course. Modules could be very different from one Uni to the next so I doubt there will be much inter-uni note swapping.