According to Clarence House, the Duke and Duchess of Cambridge will "visit California, United States of America, following their Tour of Canada in July this year. The Couple will visit the State of California from 8th July to 10th July 2011".
"The Duke of Cambridge has never before visited the United States of America in an official capacity. His Royal Highness has visited the United States of America privately. The Duchess of Cambridge has never before visited the United States of America officially or privately."
I think it will be an awesome and huge trip overseas. We will have two weeks of photo galore of William and Catherine together under tremendous scrutiny. Delish!