I have been working on an article about Datafeed BASICS for beginners. This is VERY plain and elementary for newbies or even merchants who don't understand datafeeds.
"Datafeeds 101- A Beginner's Primer"
Plus here is the 1st article I wrote on datafeeds for WebProNews for anyone that is interested in more info"
"Double Affiliate Conversion Rates With A Datafeed"