pdivi - 8:05 pm on Dec 31, 2009 (gmt 0)

Why not use the Website Optimizer?

As a general rule, I keep conversion/ROI data away from companies that can use it to drive up my costs...and that definitely includes Google

Or why not create two indentical ads and point one ad to landingpage 1 and the other ad to landingpage 2?

My landing pages are set at the keyword level, not the ad level, for tracking (querystring) reasons. However, I suppose I could set up an adgroup just for testing, with a few select keywords, and do the two-ad scheme you described. Good idea. Thanks!