We've had Limited success. I am not a huge fan of whoring out the business via my facebook and twitter accounts, yet one of my partners is big into it. It has worked in terms of them thinking they are getting a lot for their money, but I personally think that whoring them out creates user turnoff and will eventually backfire.

Local companies aren't always internet savvy (when it comes to how they are performing) therefore can be talked into paying more and not getting their monies worth (not something we do nor do we promote this... but I have seen it done via working in radio for years).

They are also quick to pull ad money when their resources become scarce.