comScore has released their June 2009 rankings and the search market share landscape looks the same as it has for a long time. Yahoo! lost 0.5% of share, which Microsoft picked up the majority of, presumably with the launch of Bing.
Another little nugget of hope for Microsoft: while the volume of search queries declined for Google and Yahoo!, Microsoft saw a 3% increase in June.
Here's the raw data:
Search Market Share
YouTube is continuing its trend of surpassing Yahoo! in search query volume: