This site was built using Adobe Flex. When Flex 2.0 was released they had a demo application that was identical (other than the colour scheme). Flex isn't too difficult to learn and probably something that a savvy web developer should have in their toolbox.I use jQuery quite a bit and I will still be using Flex with my clients.
Although jQuery is an absolutely incredible framework. It shouldn't be the only 'swiss army knife' you use. Just my 2cents.
