http://walletup.com/i/postimg/20101018_160806p.jpg

Transcend 16GB Class 10 Secure Digital High-Capacity SDHC Flash Card for $21.99 Shipped

Transcend 16GB Class 10 Secure Digital High-Capacity SDHC Flash Card for $21.99 shipped.  Here is a screenshot for your reference.  Class 10 is currently the highest speed for SDHC memory cards and provides significant faster speed than previous generations of SDHC cards.  Most places have it for about $29.