But I got mine from WalMart a few years ago and it was a 2 USB port version.
I'm giving you the link to the one port version that is sold on Amazon.
http://www.amazon.com/MusicPower-0900-70-One-USB-Adapter-Charger/dp/B000QFKDJ2/ref=sr_1_2?ie=UTF8&s=electronics&qid=1241401853&sr=8-2
I'm looking for a nice compact wall charger for my 4G nano that wont crap out after 2 or three charges. Granted it's only for trips but i'd still rather have something that can last a while. Preferably something with folding prongs and under $10. It's only for within the US for now so i won't worry about international compatibility yet. Please provide the amazon link to the charger as that is where i will get it from.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic