As [Kalanda] published on its blog (spanish)  and github, there is one more (easier) way to establish connection with an Arduino over a network connection (among the others):

serial2socket-proxy is a cross-platform software application developed in Processing for creating a virtual connection between the serial port and a network socket port.

For example, you can control an Arduino board connected to the serial port from any computer over internet. Also you can use this socket connection for communicate with your arduino board from Flash/Air application programmed in Actionscript, a PHP application or whatever language that can access to a socket

via [Kalanda’s Github] and [blog]