Great news, tapestry 5.0.16 has been released. This is the first release candidate and expectation is that the release version will be available in less than a month.
While tapestry 5 has been production ready for quite some time now, this is a major step forward for adoption of this wonderful framework.
Major selling point is the component based way of building pages and clean separation between code and template.
If you want to see how things are done in tapestry 5, have a look at the jumpstart project, which contains great tutorials.
With some good component libraries (like chenillekit and its predecessor t5components) we are on our way to build some nice stuff. Chenillkit itself is also nearing release status for all components. Some good stuff like the access module (which I dearly need) are fast moving forward.