For a while now (since well before we started the SwingX-WS project) I've been interested in making Swing accessible to the hordes of web authors out there. This demographic is being actively persued by Adobe(Flex) and Microsoft. Web folks are doing more and more to enhance their web applications via AJAX in order to get closer to a rich client experience. At some point it makes sense to use a rich client toolkit -- and each of us (Flex/Flash, Avalon/XAML/WPF, and Swing) want to be the toolkit used. This space (called Rich Internet Application or Smart Clients) is, I believe, a real growth area.