Thanx for posting to our blog and your interest in SR-IOV.
We have tested more than 2 10GbE ports with SR-IOV using the Intel(r) 82599 controllers without any issues in a variety of servers, though I'm not sure about that specific server.
It is up to the server manufacturer to meet specific criteria in order to support SR-IOV in their platforms. We simply do not have the resources to test in every new server that comes out.
While the Quad Port card you mention may be very nice, it is generally not our policy to test the Ethernet devices of other companies, as such we have no experience with it at this time.