johannes - 2:12 pm on Oct 9, 2003 (gmt 0)
Yes I think more will pull their ads out of content sites, when they use the new tracking system and can see what the conversion is.
keywords served on content pages have much lower conversion rates than those on search pages.
I've found the the conversion for these ads varies a lot depending on which keywords you target. Worst are very broad keywords. For some keywords I have an excellent conversion.