i’ve been following fred wilson’s musings on challenges with google adsense and have started to play with a few (see kanoodle on side but i would in no way encourage anyone to click:). kanoodle doesnt seem any more targeted and relevant that adsense. i’d love to hear what other people’s experiences have been. also, why is everyone so excited about ads in RSS feeds (chris pirillo!)? also, why would an advertiser ever agree to pay on a CPM basis for RSS ads when there’s no way to know if they’ve been seen. sounds like the problems we had with push technology all over again.