They have a free trial, so you can check it out and see how it works for yourself!
Pandora's CTO Tom Conrad had this to say about using Laszlo to develop Pandora:
Our just-now-launched music discovery service, Pandora, is an OpenLaszlo application. It wouldn't be fair to finish up our launch without a tip of the hat to the amazing Laszlo team and open source community.
Eight months ago when we sat down to figure out how were were going to deliver a compelling zero-install discovery and listening experience across Windows, Mac, and Linux in record time we considered everything you can imagine: plain old HTML, AJAX, Flex, OpenLaszlo to name just a few. In the end, Laszlo was the clear winner on all fronts. Mature, reliable, and the perfect tool for the job. This outcome was only remarkable in that the decision was made by some of the most capable AJAX developers on the planet. I'll have more to say about Laszlo in another post, but for now I just want to publicly say thanks to the great team at Lazslo. Pandora wouldn't be Pandora without you.