Even though no official release has been issued yet, I have been seeing lots of speculation lately that it's going to start on Sunday, the 5th. I am still trying with very little patience waiting for the official word on when it's starting.
I got the new issue of the TV Guide in the mail today and it features the Summer Preview and here is what it said about BB11: (On page 39)
Big Brother 11 (July, CBS) Thirteen strangers spend a three-month sentence in the big house. Expectant mom Julie Chen returns as host.