Google maintains its lead in search - squeezes Yahoo and MSN more
Google continues to dominate the search business and keeps its market share at 64% while Yahoo’s share is about one third of Google way down at 22.9% and MSN Live is at 8% as per the press release of hitwise. Ask.com comes fourth with a market share of 3.5%.
Here is the chart from the Search Engine Land

But watch out for Cuill, a search engine startup started by ex-Googlers which is currently in stealth mode and plans to reduce the cost of indexing by 1/10th.