It might be a good idea to serve referrals to google adsense along with the current contextual ads. Preserve the revenue sharing system Worth giving this a shot, maybe start serving 85% contextual ads and 15% referrals & see how it goes.
I agree tbh. Although lots already use adsense, adwords and firefox. And who wants picasa ey (heh, infact... i actually have it. Never use it personally)