Here are the latest search engine Market Share numbers.

comScore
Google held steady at 65.5 percent (up from 65.4 percent in April).
Yahoo held steady at 15.9 percent for the second straight month.
Bing grew to 14.4 percent (up from 14.1 percent in May)
Ask held steady at 2.9 percent.
AOL fell to 1.4 percent (down from 1.5 percent).

via June 2011 Search Engine Market Share from comScore, Hitwise – Search Engine Watch (#SEW).