FYI. I converted an IceFaces application that took weeks to develop to Wicket in one weekend. It took me less than a day to convert the same application to Vaadin =)
Now the hard part… to try to convince our architects to use Vaadin instead of IceFaces…
In fact, many people are using HP LoadRunner to load test ICEfaces applications. It’s simply a matter of collecting and echoing the ice.view and ice.session parameters and simulating a browser window close with a dispose-views request.