Check the miner list, there are are least six miner progs available for RVN.
x16r (Raven) + many others.
People have been mining RVN for weeks with SMOS, my weapon of choice was enemy-1.03.
SMOS thread
https://bitcointalk.org/index.php?topic=1541084.0 agreed it has been available for at least 2 weeks - SMOS > SuprMiner > SuprNova