Valery Silaev has pointed me to an article on flex.sys-con.com that demonstrates how the asynchronous features of Jetty have been used by Farata Systems to achieve some excellent scalability results with BlazeDS.
BlazeDS is an open source server side that provides comet style streaming events to a flex/flash client side (but not strictly comet as it is not strictly ajax).
Good work!
Greg is the lead developer of the Jetty open source servlet server and a member of the experts group for the servlet specification from the Java Community Process. Greg has contributed to Geronimo, JBoss, activemq, DWR and other open source projects. Born in Sydney in 1964, Greg graduated from Sydney University with an honours degree in Computer Science in 1986. Since then he has worked as developer, designer, team leader and architect on varied problem domains including telecoms and WWW. Greg is the founder of Mort Bay Consulting and the CEO of Webtide.