Thanks. I spoke to someone at SmallTree Communications he told me the same exact thing.

To make matters worse, I'm using Macintosh clients and there is no subnet management software for the Mac. And the only Mac IB drivers are dated and unsupported.

What turned me on to the idea of IB is that the cards can be purchaced online for dirt cheap. Someone on ebay is currently selling Voltaire HCA 400ex cards for $175 each.

But if I have to buy a switch, there is no cost benefit over 10gbe.