Use phone as bluetooth mouse. Download server here: http://people.virginia.edu/~jcs5sb/AirMouse.zip Before using, you must first pair your phone with your computer.
xkcd fans, this is for you. Were you inspired by Randall Munroe's graphs of Google searches? Well now you can create your own on the go, with this app. If you don't know what I'm talking about, here's an example: http://xkcd.com/715/