Greg Wilkins
The Google Widget Toolkit allows Ajax applications to be developed in java code using the traditional UI widget paradigm. The toolkit includes support for RPC, but not for comet style Ajax push.
Online Gaming is an excellent use-case for Ajax and I've been working with Ryan Dewsbury of www.aplayr.com to convert his GWT powered games of risk and poker to use Jetty continuations.
Gaming with GWT and Jetty continuations
