This deal has ended.
Buy.com has the 16GB Kingston Secure Digital High Capacity Card on sale for just $49.99. This flash card is considerably faster than standard SD (you'll notice this both when using the card in a camera and when transferring data off of it). Be sure to check that your device and/or computer is compatible with SDHC (versus standard SD). Shipping is free and there's no sales tax (except CA, MA, MD, TN).