Adsense is working as it should, but I recently noticed that someone keeps coming to my site and clicking over and over again. I had to remove the ads for awhile to prevent getting banned, and have since installed a program on my site that will only allow a couple of clicks before it makes the Adsense ads unavailable. There is an option to insert code from other PPC companies that will show in place of Adsense once the maximum clicks have been reached, and I think I'll utilize that.

Have you guys used any of the other PPC programs? Which ones would you recommend?

Never had any experience with paid ads banner on sites. But I did came across an article warning about being banned in adsence due to multiple clicks within a short period, which can be done by competitors intent on getting you off the market. I got wind that yahoo has a similar program and pays better too.