Ad Manager

I would like to add an Ad manager to one or more of my sites. When I write Ad manager what I mean is I would like to sell advertising space. Yeah yeah I know I can use adsense and others and indeed I do. This has been fine but it just does not generate enough revenue. I have a site that is getting 30K hits a month and is growing. I this this is enough to try and sell some cheap ad space.

So my question is. Is there an ad management plug in that I can use to sell and manage ad space ? A complete Ad management system would be awesome. Eg click here to add your ad and then take payment and let the user upload their ad and ad details. With reporting would be ideal so users can see how many times there ad has been displayed and clicked thru.

So anyone got any “Sensible” suggestions.

Ta