This just came today. They sell this Griffin charger in the Apple store too. I bought mine off Amazon. They may carry it in one of this forum's vendors too.
I bought the OEM Apple charger in the store for $29.99, but returned it as this Griffin charger also comes with a car cigarette lighter adapter and $10 cheaper for $19.99. Nice looking unit and folding prongs too.
Appears to put out the same 10 watts and 2.1 amps for the fastest iPad 2 charge rate.
I've always found Griffin products to be of a quality build just like the Apple accessories are.
Amazon.com: Griffin Technology PowerDuo 2 amp Power Charger for iPad, iPhone and iPod (Black): Electronics