I have a few ideas that I think would be pretty game changing for online advertising and I would like to build my own network but I don't know where to start. I know it will take a lot of time for major publishers to get on board but I am more curious about the technical side.

What language/database model and framework are modern ad networks built on? Basically I want to build an advertising network that registers views per page and allows publishers to manage the look of their own ads and let's the users interact with the ads. Is there any good information on doing something like this or any framework you can suggest to build on?

I know this would get complicated pretty fast so if you have suggestions for ad networks that let you customize them heavily I would be glad to hear your suggestions.