This deal has ended.
Buy.com has the Dane-Elec 4GB Micro Secure Digital High Capacity Card on sale for just $9.86. This memory card is considerably faster (you'll notice this both when using the card in a camera and when transferring data off of it). It also comes with a full-size SD card adapter. Shipping is free and there's no sales tax (except CA, MA, MD, NY, TN). Compare this price to $40 at Sears.