Bruno Schaeffer calls this an interesting alternative to AJAX. The CTO of Canoo Engineering will be highlighting Java Rich Internet Application based on Swing having better industrial strength characteristics at the AJAXWorld Conference & Expo 2007 to be held in New York.

He will also be demonstrating how Swing based RIAs could be developed. He will be giving a presentation on the 19th of March on the session - 'Stronger than AJAX: Java-Based Swing in a server-side Web Architecture.' I am waiting for it.