[MassIV]

atm freenode, but i have tried one other

<keymap>
<FullscreenVideo>
<keyboard>
<f1>RunScript(script.ircchat, run_irc=True,nickname=jeroenTV,username=JerTV,password=none,host=irc.freenode.org,channel=openelec</f1>
</keyboard>
</FullscreenVideo>
</keymap>

Sorry for the wait. This should work:
<F1>RunScript(script.ircchat, run_irc=True&nickname=jeroenTV&username=JerTV&password=none&host=irc.freenode.org&channel=openelec)</F1>

I updated the wiki as well for the example to use '&' for separator and added the missing closing bracket.

This plugin is not working for me, when i try to run it from programs it opens up settings window (for this plugin) and a popup appears in lower right corner saying:
"IrcChat
Enter an away message."
the popup disappears after few seconds.

any ideas?

It should probably say that both your Nickname and Username are required.
You can fill them in if you go to the settings for the IrcChat addon.