What about tapping into the market of free online games? Of course not all games can work this way, but if it can, you have a great opportunity to gain attention.

Through viral marketing and word of mouth you can earn a lot of money with advertising. Once you have your own 'fan base' you should have enough weight behind you to take it further if that's what you desire.

At least that's my hope, as that's what I'm planning on doing :)