Eye-Fi - A Wireless Memory Card

It automatically uploads pictures from your digital camera to your PC

The Eye-Fi Card comes with everything needed to make it simple to set up and connect to your home Wi-Fi network. [...] It stores pictures like a regular SD card no matter where you are, and uploads your photos automatically as soon as you return to your home network. All you have to do is turn the camera on.
via: Eye-Fi wireless SD card: Uploading digital pictures so you don't have to | SCI FI Tech for Tuesday, October 30, 2007 | SCIFI.COM