incrediBILL - 12:42 am on Sep 5, 2010 (gmt 0)
Results changing on Yahoo, lost one generic term altogether, the initial bounce wore off and it dropped out of site while more specific searches still return the article as a results.
However, still doing well at Bing!
These two are very close but there's definitely some algo variations between the two.
Another interesting difference is above the SERPs in Bing there's one advertiser, same advertiser I see on Google, a big name defacto advertiser for this SERP, which is missing altogether on Yahoo.