I have also tried myself at a coin design. Unfortunately I have not figured out how to upload them to the mentioned flickr album, but they are available here:
http://www.flickr.com/photos/116462858@N08/

http://farm8.staticflickr.com/7297/12309142995_089ec5b3fb_n.jpg
http://farm8.staticflickr.com/7407/12309304353_f3382550a6_n.jpg
http://farm4.staticflickr.com/3699/12309736366_414679acf3_n.jpg