brad@ had committed a fix that worked for me, that allowed the dual port's to show up. (mine were PCI-Express). The fix should be in 3.8
em0 at pci5 dev 4 function 0 "Intel PRO/1000MT (82546GB)" rev 0x03: irq 10, address: 00:0e:0c:71:83:2c em1 at pci5 dev 4 function 1 "Intel PRO/1000MT (82546GB)" rev 0x03: irq 7, address: 00:0e:0c:71:83:2d
