This deal has ended.
Buy.com has their Kingston 4GB Mini Secure Digital High Capacity Card with SDHC adapter on sale for just $15.95, $1 less than our previous posting. Sign up for a new Google Checkout account to get an additional $10 discount. This flash card is considerably faster (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 or mini SDHC (versus regular standard SD). Shipping is free and there's no sales tax (except CA, MA, MD, TN).