Richard is spot on. We have not released RCU 3.0 yet. The beta program is wrapping up and it should be released in the late January early February time frame.
Here is the vSphere support information by release:
RCU 1.0 - vSphere NOT supported, unlikely to work
RCU 2.0 - vSphere NOT supported, unlikely to work
RCU 2.1 - vSphere NOT supported, some features work (NFS), many know issues
RCU 3.0 - vSphere FULLY supported
Thanks for you interest in RCU. Please ask your NetApp or partner SE for access to the beta if you'd like give that a try.