It would depend on what port they are in. The Grandeur doesn't have a live web cam like the Explorer and Voyager does. If you know what port the Grandeur is in today, you can find it that way. Just hit the link for the Cruise Cam Station above.
Every Saturday until May 1st you can see the Grandeur on the Port of New Orleans' web cam. There is a link to the webcam on this site on the webcams page. She was in port yesterday and looked great. Can't wait until our Grandeur cruise in April!
Also, in addition to the Port of New Orleans cam listed on Cruise @ddicts, there is another Port of New Orleans cam. After this comes up, click on "Switch to view of the Crescent City Connection Bridge."