Jython's star is rising again, evolving from an interesting tool to a useful tool.  Here are some recent testimonials.

• Jython is just too useful 
• Jython as a learning tool
• Jython and JXPath
• Using Java to define Cocoon Flow
• Scripting with Jython Instead of XML
• Python and the programmer
• More on Rapid Prototyping: PyQt, wxPython, Jython

Here are some Jython books:

• Jython Essentials
• Jython for Java Programmers

Jython hasn't been updated in a while but, thanks to the renewed interest, I think the chance of work on Jython resuming is good.  I use Jython whenever I am either *too lazy* or *too busy*.  I recommend Jython to all Java programmers.