We have created a wordpress affiliate plugin which shows some daily deals from xml file.
It works easily. You just place the affiliate xml url and the deals are shown up.
We want the same one for Joomla 2.5 & 3.0. We will provide you with the Wordpress Plugin to see how it works.
We already have an affiliate joomla 1.5 component that it might help you to waste time.
Only experienced developers please.