You can download the NetBeans modules there (and join the forum). For a lengthy document (with screenshots) describing the length and breadth of Facelets support in NetBeans IDE, see Support for Facelets in NetBeans IDE.
Here's the NetBeans result of the first application you build in Getting Started with Facelets:
Apart from being able to select JAR files and set up a source project, the extensions to the editor for Facelets support look pretty interesting and advanced for a project that has only just been launched.
The project is looking for feedback from real Facelets users. If you are one of them, it would be great if you'd try out the NetBeans support modules for this framework and evaluate them and comment on how they could/should be enhanced.
In other news. Check out Bernhard Huber's blog. It is fantastic, lots of cool stuff relating to NetBeans module development.