RadioShack.com has a really really good price on the 64GB SanDisk Ultra SDHC/SDXC flash memory card. These Class 10 UHS-I rated cards feature up to 30MB/s speeds (enough for full 1080p recording), and is waterproof, temperature proof, x-ray proof, shockproof, and carries a lifetime warranty. It's $39.99 with FREE shipping to your local Radio Shack store. 64GB SANDISK ULTRA SDHC/SDXC UHS-I FLASH MEMORY CARD DEAL
- Update: Out of stock, congrats to everyone who got one.