Good Introduction to Comet (aka Long Lived HTTP Connections, aka...)
By pelegri on Oct 04, 2006
We have been covering Comet for a while (TA articles), and JeanFrancois recently uploaded a Presentation to the Wiki, but a good introduction is always useful, and Andi has a good Introduction to Comet Basics. Check it out!
In the meantime, Grizzly seems to continue to get traction; for example see Brian's blog. The Grizzly bundle was recently Added to the Maven Repository, and JeanFrancois is making the framework into a separate, more reusable, project.