Intel H55 and em0

I recently picked up a H55-based motherboard, and the ethernet interface 
isn't autodetected.  dmesg lists it as the following:

pci0: <network, ethernet> at device 25.0 (no driver attached)

And pciconf lists this:

none1_at_pci0:0:25:0:      class=0x020000 card=0x00008086 chip=0x10ef8086 
rev=0x06 hdr=0x00
    vendor     = 'Intel Corporation'
    class      = network
    subclass   = ethernet


I'm actually not sure it's an em device, but it's definitely gigabit, 
and googling suggests that others have recently run into the same issue.

Since I'll probably have to recompile, is this currently working in 
recent builds of 8.0?  This was just a vanilla 8.0 release image.  Would 
some simple change tell the driver to recognize this card?

Thanks in advance.