If you want to delve further than PPC, you might want to consider starting your own Facebook group. Groups such as I bet I can find 1,000,000 people who dislike George Bush!’ are good examples of the type of thing you should be aiming for. The benefits of being an admin of such groups are great, as you can mass message all of them your offer or promotion, and as long as it isn’t blatant spam, you should be A-OK