This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
It's all about photos in the cloud though. So all of your iDevices must be iOS 5 and be set up to use the cloud. Then when you snap a pic, I assume, you have the option to store that pic in the cloud....which you can then access from any idevice you own.