The dogethereum bridge is currently under development, but it will allow the transfer of Dogecoins through a sidechain to be transferred with a smart contract to receive Ether on the other end. This would be a very big step for cryptocurrency in general and can make Dogecoin more useful. It has been recently announced that Ethereum was going live with the Ropsten testnet and the price has been spiking and dogethereum is a big part of it.
In the case of a successful transfer, Dogethereum will have successfully been implemented. This could be a great step for Ethereum and Dogecoin because it would allow them to work together to complete different tasks. The rise in price also shows that investors are trusting in the technology behind this project which is very promising.