Nimble Storage arrays will be fully certified and on VMware's HCL for vSphere 6.0 from firmware release 188.8.131.52, which is due to be released in the coming few weeks. This is also true for Nimble Connection Manager for VMware, and the Nimble vCenter Plugin (although C-Client only still).
The new Virtual Volumes (VVOLs) feature will be supported under "Tech Preview" mode in an upcoming feature release of firmware due for release in the next few months. Please speak with your local Nimble account team to get more details on our plans if you would like to know more, as we don't tend to post forward looking commitments on open forums.
Hope this helps!