Yesterday I wrote about a MediaPost report claiming Microsoft Bing will be the next search engine to try favicons and images in search ads.
Google tested favicons in AdWords and so did Yahoo search ads. Google Japan even went large with those icons in the ads. Plus Google tested them in the normal free/organic results.
Matt Cutts told me yesterday that AltaVista also had these, as an extra paid option to their search ads.
So that goes way back in time.
I have not seen examples of Microsoft Bing testing these favicons in the adCenter search ads. Not yet at least, have you?
Forum discussion at WebmasterWorld.