Wired: First Look – Google Cloud Print Online Printing Utility
Unlike Apple’s AirPrint which works over Wi-Fi networks and requires special printer drivers, the only catch with Cloud Print is that you have to install Google’s Chrome browser on the computers with printers you want to use.It works over the Net.
“Google’s Cloud Print is now live, and you can print directly from your Android or iOS device to any printer you might have lying around. Right now, you can see the new feature by going to Gmail and pressing the double-arrowed “More” button. “Print” is now an option in the resulting dropdown menu.
Unlike Apple’s AirPrint, which works over the local Wi-Fi network and currently requires an AirPrint-compatible printer (or an easy workaround), Cloud Print sends your print jobs via the internet.”