We've brought you news of the Eye-Fi memory card before, but it's now shipping in the States.

The Eye-Fi card — for those not familiar with the concept - is the world’s first wireless SD memory card for digital cameras.

The Eye-Fi Card uses Wi-Fi networks to send photographs directly from digital cameras to PCs, Macs and 17 signed up online photo and social networking sites.

Eye-Fi’s free upload service allows users to transfer an unlimited number of photos. It handles full-resolution JPEG pictures and "intelligently" resizes the images if required by the selected online destination.

The Eye-Fi Card works with existing and new SD-compatible digital cameras and stores photos like a conventional SD memory card.

The card is priced at $99.99 with 2GB of storage, no word on a UK release yet.