This deal has ended.
Buy.com has the 16GB Kingston Secure Digital High Capacity Card for just $34.23. This flash card transfers data at 4 MB / second, which is faster than the 1MB or 2MB speed of basic cards. You'll notice this both when using the card in a camera and when transferring data off of it. Compare this price to $50 at J&R. Shipping is free and there's no sales tax (except CA, MA, MD, NY, TN).