If you are interested in working on either of these projects then please feel free to ask any questions you have on this group.
Simon
Its also well worth having a look at my talk at AppSec USA last year - the Zest part starts here: https://www.youtube.com/watch?v=pYFtLA2yTR8&t=23m47s
I would also recommend downloading and playing with OWASP ZAP as that allows you to create and run Zest scripts graphically: http://code.google.com/p/zaproxy/wiki/Downloads?tm=2
We do know that the documentation could be better, so please ask any questions you have on this list.
Many thanks,
Simon