Well, next to Guldencoin and Digibyte there is also Auroracoin. It might not be widely in use atm, but it's a coin that has a very specific target market that is extremely overseable, Iceland has only 330K inhabitants of which 70% live in Reykjavik.
Currently the development team is testing the new exchange that is dedicated to the unique AUR-ISK pair. This is a very important step for it helps AUR to disconnect from the BTC dependency all other currencies currently have. This makes it a coin that can actually get a chance to blend in a real economy!
I am keeping an eye on AUR because it has potential and I have already done a background check on the devteam.
Not aware of the AUR-ISK pair exchange, that probably explains why you guys are not on Bittrex, it is a shame because I would have bought a lot if they were listed there.
Your main focus should be to at least have 3 shops in Reykjavik that accept AUR so it can take off and gain more trust.