Although I don't have an Android device (the salesperson talked me into getting a Windows based Smartphone and my wife bought an IPAD tablet); this Android App looks like it might be handy.
http://www.youtube.com/watch?v=y_3N3...eature=related
I didn't look at this video long enough to see if the Android device could control a Canon DSLR in video mode, but if it did, it would be great for many video shots. There are several stablizing rigs on the market which either need, or would benefit from a remote viewer.
It would also be good for having your camera suspended on a monopod or some other pole type device to enable you to shoot over the heads of crowds and to shoot over walls and fences while seeing what the camera is seeing.
It seems, if you were able to mount the Android devce on something to hold it, that it would be good for very low level macro work.
The app itself is cheap enough and simply needs a USB connection between the camera and the tablet,
I would expect that the tablet would benefit from some sort of a sun shield shen used as an auxillary viewer for a camera...