Ryan Holiday [1] has written about doing this kind of work, though I believe he has quit since. It's probably not a service most people advertise publicly since

Ryan Holiday [1] has written about doing this kind of work, though I believe he has quit since. It's probably not a service most people advertise publicly since it's in the gray zone, ethically and with respect to rules of the media used. I recommend Trust Me, I'm Lying written by the same man for an interesting account of this. [1]: http://www.ryanholiday.net/ http://www.ryanholiday.net/