behind the scenes icefaces does some tricks.
so it's required to deactivate 2 extval mechanisms. with this workaround a hello world icesfaces started working with myfaces extval.
#1: deactivate the extval el-resolver via web.xml context-parameter:
#2 switch or deactivate the default renderer proxy implementation via a extval-startup-listener.
deactivate it via:
protected void init()
i haven't tried more complex applications. you are welcome to try it out :)
if you find some issues please report them.