Performance
The official GlassFish v3 GA is around the corner. If you are planning to put GlassFish v3 in production, make sure you take a look at the list of properties available that can save your day.
Web Applications
Writing Comet application is more and more simple, thanks to framework like LIft and Atmosphere and to the upcoming Servlet 3.0 async part. But on the Client side, the difference between Safari, Opera, Firefox, IE and Chrome can make your application completely unresponsive or broken. Of course, there is some tricks to make it work.
