The Phatbox and Keg are completely out-dated concepts. They also take up too much space for the very little storage they offer.
If someone is happy going up to 40GB, I highly recommend using an iPod with IceLink (from Dension). The new link version is available that uses only the iPod's lower sync connection for Power, Audio and Control (with new iPod units).
http://www.densionusa.com/x/index.php?option=content&task=view&id=375&Itemid=79
Of course if anyone *IS* interested in putting a new deck in their dash, but not an empeg (for whatever reason) then Alpine has also come out with their own iPod adapter and at least one head unit that supports display of its text output.
Unfortunately I don't have the time to keep updating my comparison page, otherwise I'd love to add the iPod solutions and a couple of other products:
http://www.mypocket.com/mobilematrix
Bruno