Nitrogensports.eu - - clones Pinnacle (odds generally 0.1% worse than Pinnacle)
Fairlay - - clones Pinnacle (currently 0% commission on sports so a genuine clone of Pinnacle odds - BUT - the interface looks too hard to use AND not all Pinnacle lines seem to be there)
Directbet - some claim that this is a clone of Betfair - - however my own ad hoc observations indicate that this is not the case. It does not appear to be a clone of Betfair and the odds do not seem to relate to Betfair in any way
If anyone reading this thread is aware of any other BTC bookmakers that clone existing bookmakers please contribute - all replies gratefully received. Thanks for reading.