Execute JS code after AHAH refresh

For my project, I need several dynamic farbtastic color pickers. This implies in having my own JQuery events on top of the AHAH Framework - events that fire up on dynamically generated content.

I spent a lot of time finding how to re-bind my own jQuery events after a AHAH field update, and thanks to this page I finally managed to make it work.

But now I'd like to execute initialization (set the textfield background to the hex value that it contains) after the AHAH refresh, and I can't find a way to do this. Any suggestions ?