This is a good view of the dock at Riverwalk. The Inspiration is there on Sundays, the Sensation on Fridays. Also appreciate the kroooz-cam link. We are sailing the Inspiration on 10/14 and can hardly wait.
Go to the Port of New Orleans at http://www.portno.com They have several webcams on the river and one of them looks directly at the Julia Street Cruise Terminal.
If you want to read an extensive review of Carnival's Inspiration, go to http://www.scottcruise.com/inspiration This is a complete diary accounting of the cruise with detailed shore excursion information and a tour of the ship.