I posted this on another Cryptsy hate thread, but hopefully it will help here too..
I know there is a lot of hatred for Ripple because many view it as a centralized currency that was pre-mined, but it is essentially a distributed and decentralized exchange.
You can trade Doge or any other currency just like you do on any other exchange. Only difference is that Ripple has "bridges" that allow you to send your coins to the blockchain pretty much instantly (half hour or so) without having someone OK them.
You also have the ability to transfer your funds into something that has no third party risk (XRP) - and although many do not like XRP because it was all pre-mined, it has value and can't be stolen without a secret key (just like Bitcoin). This is the one thing missing in most exchanges. You need to keep your coins with the exchange so you can trade, but if you want them on the blockchain you need to send them off the exchange (TIME AND MONEY). This can all be sidestepped with Ripple.
Here's an exchange (gateway) that has implemented this on Ripple...
https://peercover.com/#/simpleGatewayYou need a Ripple wallet and about 25 xrp (50 cents) to get started. No other XRP is required except a .00001 xrp fee on trades.