I would ask what specifically you are looking for.

As a general rule, there is no need for a special NIC for networking. I can think of a couple situations that _might_ require a different NIC, but they exist outside of Openstack.

The only issue you may run into is with GRO and Windows instances on some/most cards. This can be avoided with software changes alone.

Perhaps you can be more specific about what you want to do.