Milan,
I created a Pinax-pluggable app:
http://cloud27.com/swaps/
I'll be at the upcoming Django Chicago meetup, which I think you will
attend too, We can talk.
The code for Swaps is here:
http://code.google.com/p/django-social-economics/
I made a few mistakes, including putting more than one app in that
project.
There's a patch here
http://code.google.com/p/django-social-economics/downloads/list
that includes everything I needed to do to integrate with Pinax for
the first time.
After that, somebody on the Pinax crew duplicated all the Swaps
templates under Pinax, which has caused some problems, as you can see
here:
http://code.google.com/p/django-hotclub/issues/detail?id=54
I think that duplication was a mistake, but so far, it has not hit the
priority queue to be changed.
So in short, I would not promote Swaps as a model to emulate, but you
might learn something from my experience.