Well, thank you for taking my Twitter suggestion to heart so quickly. But I see an unidentified and unclose-upped chip there at the bottom of the board assembly...what might IT be..

So, now I'll need to dissect the 16 GB Zune HD I won from MS recently, and see if there's an empty spot or not. If there is, would it be upgradable, given that I can solder surface mount tech? :)