I wanted to see how close I could get to duplicating the features of a commercial security camera with a Yun and started a little project I called Cyclops. Using information from this forum and other sites - plus some ingenuity - I ended up with something pretty functional for indoor use in spite of a number of limitations. It was a whole lot of nerdy fun. If you're interested in doing something similar I posted a write up (which also covers things like getting the uhttpd web server running). The post is here: http://buff.ly/Rjo9kW
Very nice 
Thank you!