I came across some problem using 'twistd' utility - that I would not have expected from it. The problem is - using 'twistd' to start application that requires command-line arguments. In other words, I would expect that 'twistd' passes command-line arguments to Python application - just as Python does.
But... I get following error:
You can do this with twistd plugins: http://twistedmatrix.com/projects/core/documentation/howto/tap.html