A Hong Kong distributor has started selling fake/modded MagSafe AC adapters on eBay. Apple has not licensed any 3rd party that I am aware of to use the MagSafe adapter. As I was perusing ebay to find a replacement for a customer I found this.
From the auction description:
60W power charger AC Adapter for Apple MacBook ONE pieces.
*This is a Brand new Power AC Adapter made by PANASONIC, We modify with a Original Brand New Magsafe DC plug, and use for MacBook, (Not for MacBook Pro).
size: 170 x 82 x 40 mm
Input Voltage: 100-240V 50-60Hz (USE for WORLDWIDE)
Condition: Brand New Panasonic AC Adapter + Brand New Original Apple Magsafe cord, 30 days warranty, fully refund (less postage) and buyer need pay return postage by himself, If you no accept,Please don't BID.
Besides this being ugly ... there's just no way this could be safe or convenient - it's just $30 cheaper than a MagSafe adapter from Apple. Its sad to see eBay allow such auctions.
Link to auction
* Thank you Buzmania for the tip
Apple owns US patent 7,311,526, "Magnetic connector for electronic device", for this technology.
Apple also owns a copyright and trademarke on the name MAGSAFE©™