But even these aren't a perfect solution, because the ones that work with the iPad can't send common Windows keyboard commands to OnLive Desktop, so you wind up moving between the keyboard and the touch screen, which can be frustrating.
The Sun Ray appliance effectively becomes the end node of the network, and its function is to display pixels on the screen, capture keyboard and mouse clicks, and send them back to the server.
As expected, the Liberate can receive text messages, but here's the kicker: the screen doesn't allow the use of a keyboard, which means you won't be able to send any from your device.