I think one could (somehow) put together a company that offers to host data for clients for free, in return for being able to datamine their data. Obviously there would be privacy rules to consider and content with. However, my intuition is telling me there are still opportunities in this area that are yet untapped.
Based on the cost of these 'blade' fans, I'm sure a bundle could be made on similar light fixtures.
Adding another idea to this (Aug. 4). I'm very surprised I don't see more rechargeable (hair) blow driers out there. Along with that, hair clippers. When I'm getting my hair cut, the stylist is always messing around because the cord isn't long enough, or the cord has knocked something over or gotten twisted or caught on something... Isn't that what building contractors wanted cordless drills for? They've been around for years.