Do you need to have a running core/qt wallet open to make a transaction using this app/service? So, would you need to have running synced bitcoin, litecoin, and dogecoin qt/core wallets synced and running to make trades?
Yes, the source is on Github, I'll make it public right now. I didn't post it at first because it's not really ready to support a huge amount of users, but I understand that it's important for people to be able to trust the software.
The wallet runs light (SPV) clients for each currency, so no other wallets are neccessary. The first time you run the wallet, it will take only a few minutes to sync the blockchains, then you can start sending/receiving money or trading via the peer-to-peer networks for each coin.
Thanks! Sounds very interesting. Put thread on watch mode, hope to see some more updates soon...