I have people that want to ADVERTISE on my site. It would be great if I could point them to a url where they could buy an ad online. This could be a revenue split with Invision, offset hosting costs, or paid directly to the board owner.

This is better left as a mod or as a seperate program altogether.

http://phpadsnew.com/

That's what I use, personally, as well as several others that use IPB. It's one of the best banner management systems there is. It would be nice if there was one that could be integrated into IPB with very little editting though, I will admit that.

My website uses the phpAdsNew software. It is great, and you only need to add a couple lines into the wrapper for your skin.

http://www.locationlohan.com