I think this settles it:
http://www.apple.com/pr/library/2010/06/23iphonestatement.html
"*Statement by Apple on White iPhone 4*
White models of Apple’s new iPhone® 4 have proven more challenging to manufacture than expected, and as a result they will not be available until the second half of July. The availability of the more popular iPhone 4 black models is not affected."
Message was edited by: kidhack