Yahoo is poised to launch an ad network for small Web publishers styled on a similar offering from Google, sources familiar with the plan told CNET News.com, a move that promises to sharpen competition between the search giants.
google's tos prohibits this...but it would be neat if they would allow this just to retain publishers who also want to run yahoo.
could publishers very quickly be able to discern whether y or g was paying more? they could do that anyway.
however...this could potentially eliminate a problem that adsense publishers have: running multiple adsense blocks is sometimes counterproductive. running a second block that is not adsense but yahoo would allow one to avoid some of the pitfalls of smart pricing.
if only go would go for this (allowing both on the same page)