According to a report released Monday by Internet metrics company comScore, Google and Yahoo gained slightly in overall search market share (0.3 and 0.1% respectively), while MSN dropped by 0.2%. As of October, Google now processes 45.4% of all searches on the Internet. Yahoo ranks second at 28.2% and MSN a distant third at 11.7%. Holding their own, Ask.com sits at 5.8%.
I personally can't help rooting for Ask.com to overtake MSN by the end of Q1 2007 (of course this statement brings a recent post in SEOMoz to mind).