anyone notice any traffic changes from Microsoft licensing Yahoo's search? We haven't seen too much of a change.
If you mean about Bing search then I would think they are similarity to Google than Yahoo. The cooperation between Microsoft and Yahoo does not seems effecting the current Bing search results, or influenced by Yahoo! after all.
I am seeing a slight increase in Y! traffic. That is because my site is now above the fold on page 1 whereas before it was below. Overall, I think Y! results are much better quality than before.
use SEObooks rank checker. I am seeing Yahoo and Bing at nearly the same positions for almost all keyphrases. Similarly if I do a hand search and look I see the same positions in both.
I just noticed that you may have the story reversed here. Y! is running Bing results, not the other way around.