This is pretty cool
I did notice that there isn't any information on the website about copyright on submitted images. I sent an email to Alice Wessen and she is going to work on putting some language on the website. In the meantime, if you submit an image, write any copyright restrictions you want to stipulate into the caption area for the submitted image. It's probably easiest to pick one of the Creative Commons licenses unless you want either Public Domain or All Rights Reserved.