I haven't found any unfortunately. I had to dig in
the python source
code to figure out how it was working. I should probably write a
quick start guide...
You can find it in
http://www.b2bua.org/ bellow under Documentation
sec.. may be the page is created recently
as the website said ...
"Please note that it is still work in progress (last updated on 29
August 2007), please make sure to check for updates periodically."