I am looking for a script that can let me setup advertiser accounts so they can login and track their own stats. for example if they buy 100m page views then after their page view is reached the limit the banner will be auto rotated to the next banner.
something like adbrite
http://www.adbrite.com/index.php

Are there any good scripts like that? if so how much. thanks.

I am interested in something like this as well.

http://www.openx.org/

That may be what your looking for.

+1 for OpenX

+100 for OpenX