A few suggestions: Do some footwork, visit businesses you think might be candidates and put the proposal to them. Use the Yellow Pages for ideas. And, of course, if any of your acquaintances are business owners you might have an edge with them. Check businesses which advertise on billboards and bus benches. And, businesses which advertise on those traveling billboard trucks. You're selling advertising. You'll have to decide what your service is worth to them, and whether or not that price is worth it to you to turn your smart into a billboard.