Jetty and Webtide at Zimbra / Yahoo
Covered by Application Development Trends
A great endorsement of the performance of Jetty for Ajax apps. (and of course, for the help Webtide can provide).
Application Development Trends article link
Zimbra's blog entry on the subject.
Zimbra serves millions of users, and we're proud to work with them. Webtide's services and support help many companies scale their apps rapidly and economically. Drop us a line if you're interested to discuss.