I keep seeing random things on the nets that people have made. Interesting uses of technology. Many of them far from the original intended purpose of the device in question.
Take a wifirobot (http://www.jbprojects.net/projects/wifirobot/) for example. That could be made using a cell phone as well.... then you are only limited by batteries and cell coverage. I always wanted to make my own mars rover type vehicle :)
Any of your own?