Great work. $25 is certainly a good price point. Very cool, and it looks elegant as well. Not that it's a big deal, but it is nicer to use elegant stuff.
Did you create this in Eagle? I'm interested in creating a board using Eagle, and was wondering if you have to buy a full license of Eagle to sell it. Do you know? (I'm hoping the answer is no).
BTW, I noticed that the "tutorials" link on your website's "modified pico" page does not appear to go anywhere.