Samsung 16GB Class 6 Waterproof SDHC Card for $10 + free shipping
newegg offers the Samsung 16GB SDHC Class 6 Waterprrof Secure Digital High-Capacity Memory Card, model no. MB-SSAGA/US, for $9.99 with free shipping ($0.62/GB). That's $2 under our August mention and the lowest total price we've seen for this card. (It's also a current low by $5.)
4 very similar deals were also reported by some other sources: