Thanks for the options Alex, I'm considering directions.
Luke - normally I don't build "generically" enough to do that. My sites and galleries are built to lead to a specific site - colors match the sponsor's tours, text is aimed at the site (usually with the Site's name), I even chop some graphics out of the sponsor's tour and use them on my sites/galleries.
My click-throughs are lower building like this, but my conversions are stellar. I tell everyone I won't send you much traffic, but it'll convert
I guess what I'm going to have to start doing *is* building more generically. Using my PHP includes to be able to change sponsors rather than just changing one sponsor's ads (like change banner 1 for banner 2, I'll instead change sponsor 1 for sponsor 2).
That'll be a big learning experience for me, building generically like that, but I gotta try it. We know that ARS isn't going to be the only sponsor to go through big changes this year.