Sharing Revenues via Software?

I’m in the process of setting up WPMU and three blogs as subdomains. One of my blogs will be co-developed with an associate.

Is there a software solution that, for a given blog, can track all revenues, store, ads, etc., from that blog and assign a split?

Of course this can be done via accounting software, but I was looking for something more automated, like the ability to make the associate a “super-affiliate”.