They seem like a strong team, but the list of client technologies feels more like a skills list you would put on a resume than a reasonable design choice. Is there a javascript framework they didn't use?
JavaScript, XHTML, CSS
Prototype
JQuery
Ext
Scriptaculous
YUI
Seam
JSF & Facelets
RichFaces
Google Web Toolkit
Adobe Flex
Adobe Flash
Google Maps API