Hey this is a really cool idea. I was wondering are you only promoting Bitcoin, Litecoin, Peercoin, Quark, Worldcoin, Namecoin, Novacoin, Primecoin, and Feathercoin? I noticed that you provided the option of other but would it be possible to once your site gains popularity add coins such as devcoin? If you are unaware of the coin visit http://devcoin.org/ and http://www.devtome.com/doku.php. I think if you are trying to show the benefits of the crypto currencies and show how much they can help the world the best coin to show would be the coin created with an ethical inspiration! If governments realize how not all crypto coin users are the black market type. If you had any other questions not answered on these sites please PM me.
Thanks! Good luck on your site.
-AM