ANNOUNCEMENT: Our speculation dAPP featuring our Over/Under contract has been taken down for now due to Oraclize issues on the Ropsten testnet. The dApp will be redeployed once we can confirm it is working again! Sorry for any inconvenience and we will announce when it is back up!
For transparency here is our smart contract on Etherscan: https://ropsten.etherscan.io/address/0x8466bc490d87b01d7b0d0f9b5682a806e49966d6 , you can see the last callback from Oraclize was executed 2 hours and 9 minutes ago and the next bet placed sent a transaction to Oraclize as it should but never received one back.
You can also view our chat with Oraclize support here: https://gitter.i m/oraclize/ethereum-api , as we work to resolve this issue immediately! Thanks all.*Edit: The link to the Oraclize support chat was blocked as suspicious so we separated the 'i' and 'm' above. Just copy the full link ending at '-api' and remove the space to view the chat!