Just to know that this project is not abandoned, I have just switched to the “Opensource” subforum instead of “Tech Support”. The project is finally on github:
https://github.com/gabonator/DS203
latest version can be downloaded here:
https://github.com/gabonator/DS203/zipball/master
And the discussion on opensource forum is here:
http://www.seeedstudio.com/forum/viewtopic.php?f=10&t=2362&p=9179