From http://forums.slickdeals.net/showthread.php?t=886165

Microcenter has the Patriot 8GB SDHC Class 6 Card for $19.99 after rebate.

Online / Instore (B&M) price = $31.99
Rebate = $12.00
Net price = $19.99 + Shipping and Handling (or replace with tax for states that have a microcenter B&M)

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Link to product on microcenter website.
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SKU: 756627
Mfr Part #: PSF8GSDHC6
UPC: 879699005180

Patriot Signature Line (SL) Secure Digital High Capacity Flash Memory cards are based on SDA 2.0 specification, a completely new design that is required for cards and hosts to support 4GB and higher capacities. These cards adhere to SD Speed Class Rating specification which defines a minimum sustained transfer speed for SDHC cards. Patriot SDHC cards provide the ultimate flexibility and storage expansion for the latest SDHC compatible digital devices such as digital cameras, PDAs and mp3 players.

Product Specifications
Storage Capacity 8GB
Card Speed Class 6 (6MBps Data Transfer Rate)
Slots Required Secure Digital Card Slot
Manufacturer Warranty 5 Year Limited Warranty