With the extensive APIs for Steem, I'd be amazed if someone didn't create an oracle to pick up stuff on Steem to resolve conditions on smart contracts. It would allow two Steem users to make a bet how many votes a given post would get in 30 minutes. After 30 minutes, the oracle posts the data from the API to the Byteball DAG, thereby allowing the conditions of the smart contract to determine which of the two parties can withdraw the funds that both users deposited on it for the bet.

Stuff like that :)