Virtualization and InfiniBand

10GBASE-T is not compatible with Cat5e, it needs Cat6 cabling. It is also still a pipe dream, who knows what process node will be necessary to get acceptable cost+power. All 10GIGE stuff currently is deployed with CX-4 (Identical to SDR IB) or XFP/SFP+ (still surprisingly expensive).

The big 10GIGE vendors are desperately pushing the insane FCoE stuff to try and get everyone to re-buy all their FC switches and HBAs since 10GIGe has otherwise been a flop. IB is 4x as fast, and 1/4th the cost of 10GIGE stuff from CISCO :|