RhinoCycles is great news! I did some quick tests with the previous WIP (on laptop with CUDA/Quadro K3100M), it is quite fast - 800x600 render at good quality setting in about 30 seconds.
The latest update though gives an empty render, i checked all the settings, but no success.
Hey Raja !
If seems to work here (testing with cpu only). You may download new wip from 4/7/15 to see if it works better 
greetings,
clement
Hey Clement,
Ok, i will try with CPU. updated to wip from 4/7/15 but still an empty render. Maybe, with the next update.
regards,
Raja
I haven’t committed to WIP trunk in a while since I’ve been busy working on the ChangeQueue branch (interactive rendering and a host of fixes).
I hope to merge that all still during this week, so hopefully next week your problem gets fixed too with the merge.
/Nathan
There, I’ve just merged the ChangeQueue branch to WIP trunk, so whenever the next WIP gets released you should get a lot of goodies.
Tomorrow I’ll be making a screencast of what the current status is.
/Nathan
ok! sounds good, looking forward to trying it out.