Hi Dan,
Again, I apologies for the confusion. The Datastore Provisioning Wizard is actually a feature of the RCU. As I suggested in the related post, we've been getting this a lot lately, so I don't think it will be long before we clear things up. 😉
The RCU will provision and mount NFS datastores only if the ESX hosts' vmkernel interface and the NetApp controller all have ip addresses on the same network (in the same subnet). This is a best practice that the RCU enforces to prevent performance issues from sneaking up later. The same logic is used in the case of iSCSI. The VSC and RCU are both fully supported NetApp products, so if you're having issues, please don't hesitate to open a support case.
Thanks for using our tools and for posting the questions (you're not the first person to run into this).
Cheers,
-Eric