I was half asleep when I visited their site and went through the PHPAds -> OpenAds upgrade (couldn't go any further due to script requirements and the clients php install version) and said the same thing to myself :x

I'll vote for OpenAds or whatever it is now... OpenX. I started using it a year ago and it works really well. I too found it a bit much to get to use at first because all I really need is an ad server that keeps stats as well. It has a nice feature that emails statistic reports to your advertisers which is sweeeet! It does a lot more too and since it is free you can't lose for trying it. If a knuckle dragger like me can figure it out then it can't be too difficult to use!

I can recommend it as well. Been using it for years and it works great. The interface can be a bit confusing at times because of the sheer number of features, but there's great documentation and once you get the hang of it it's pretty straight forward.

A follow-up to this discussion. We went with Ad Peeps and have been very pleased with it. Highly recommend it.

Thanks to everyone for the feedback. It was very helpful.