I wasn't refering to a bridge as being a "network bridge",but i can understand it's confusing,my mistake.
What i meant is like building a bridge between ethernet and wifi.
As for Xebian,it installs pretty easy,has a GUI : FluxBox (wich i'm not using) and is basicly a standard Debian install "patched" for the xbox.
Allthough i did search the net for info i probably missed it so thanks for the links.

Greetz