Programming in Pi calculus

Is it really interesting to write program in Pi-calculus ?
Is it easy and feasible to write program in Pi-calculus?

The answer of the above questions may vary for an individual. But yes i would say at least we can give it a try to write code in Pi calculus environment. Yes it is always difficult to write concurrent code. In case of Process calculus, programmer always have to keep thinking everything in term of process, weather it is function or object or anyother data structure. Pict and Nomadic pict are the language which are based on Pi-calculus and provide programming enviornment. Pict is not distributed programming language but NPict inherits the attribute of pict with distributed features, i.e. various component can be held at different machine and they can work collectively towards a common goal.
It is not anymore surprised that we can repersent most of the object-oriented features in Pi-calculus. Objects,class,function all are repersented in the form a process.