Google is still number 1 and growing. According to comScore Networks, Google claimed 44.6% of all online searches in the U.S. in June 2006, compared to 36.9% in June 2005.
So where else do you invest your CPC marketing budget? *Yahoo! - 28.5% market share, followed by *MSN - 12.8% market share and *Ask, with 5.1% market share.
*comScore Networks (June 2006 statistics)