Unwilling to believe that resistance to a Microsoft takeover is futile, Yahoo is throwing a lot of strategies at the wall to see what sticks. Its latest effort is a trial advertising partnership with Google -- a two-week test of its AdSense service. Yahoo plans to run Google ads alongside up to 3 percent of the search results generated on Yahoo Web properties in the U.S. Microsoft general counsel Brad Smith immediately protested that a Yahoo and Google tie-up would create a competitive imbalance, and he reportedly said so with a straight face.