Hi,
Started working on a blog with some of my Unity experiences, and one of the things I did recently was create a UISprite subclass that allows me to display a slice of a standard sprite. Now in order to explain it, I had to paste some NGUI code, but it's pretty much useless without the entire NGUI library (which I don't share), so I assume that's not a problem.
You can check it out here:
http://www.cwgtech.com/?p=23Thanks