I suggested this part in another thread earlier today...
Eye-Fi » Home
Feature Set:
Eye-Fi » A Wireless Memory Card?
Looks interesting--It looks like you should be able to read/write the WiFi SD card while it is in your camera (and the camera is turned on).
Built-in Wi-Fi connects to your home network.
* Wi-Fi Security: Static WEP 40/104/128, WPA-PSK, WPA2-PSK
* Range: 90+ feet outdoors and 45+ feet indoors
* Storage Capacity: 2.0GB (1GB is defined as 10^9 Bytes)
* Power: advanced power management optimizes use of camera power
* Card Dimensions: SD standard 32mm x 24mm x 2.1mm
* Card Weight: 0.1oz.
~$99 list price for 2 GByte Eye-Fi card (with WiFi interface and software for PC's and Macs to automatically download and export pictures to third party websites--assuming you want to).
-Bill