Salut !!! J'ai trouvé aussi interressant ce script mais j'arrive pas à l'installer. Au fait l'installation se passe bien mais je ne comprends pas ceci :

* For security purposes, please delete install.php.
* The Node.js server host has been added to js/im.load.js; please confirm that the URL generated is correct.
*

To get the standalone Node.js server running, you will need to run the following command on the command line of your server:

node server/server.js

However, it is recommended that you move the server folder outside of the main installation directory before going live.
*

Now that Ajax IM is installed, please see the Quick Start with Node.js guide to complete set up.

Aidez moi svp