Amazon.com: 10Gb PCI-E NIC Network Card, Dual Copper RJ45 Port, with Intel X540 Controller, PCI Express Ethernet LAN Adapter Support Windows Server/Windows/Linux/ESX, Compare to Intel X540-T2 : Electronics
48-Port L3 10G Switch with 40G Uplinks - FS.com
Dell QLogic FastLinQ 41162 Dual Port 10Gb RJ45 Network Adapter