hyperkik - 2:18 pm on Mar 9, 2005 (gmt 0)

There are a couple of easy changes Google could make which I would find beneficial. For example, if you are using rotating ad banners, they could track CTR for each color combination, such that you could figure out which combinations work best on your site.

Also, they could implement positive and negative keywords by channel - and spend as long as they want playing with and analyzing that data before deciding how much weight to apply to it - such that we can at least give <em>some</em> relatively specific feedback into ad relevance and irrelevance.