Well honestly I think Jafula did quite a good job in creating jamba in a way, that the basic features are self explanatory, so for me there was never a real need for a full featured documentation. Also the original version we're realy well documentated, and its more the 'newer' features wich lack some info...

...but combined with Jafulas habit of answering all questions quite quick (and in detail), I realy don't want him to write a extended docu, but to focus an bringing us more exciting features ;)

..from my point of view, he wrote an awesome addon, which realy saved me alot of time, and maybe it is now our turn to give the favour back and write some docu/guides/examples for him, rather than complaining..
..especially considering that it is free.