It's good to see that Jython is under active development again.
I use cPython a lot. I'd pretty much stopped using Jython because it does not currently support language features that I find essential - decimals, generators and list comprehensions, for example.
The project seemed to be dormant, but Jython 2.2 has just been released, and it looks like Jython 2.5 is on the way, with all the critical features that I need. Excellent news!