Xserves and 10gbE XFP cards

So we’re doing a major upgrade to our switch infrastructure this upcoming year, and I’m seeing that I may have to replace our old G4 XServer with something more modern just to handle the new hardware. Specifically, I’ll need to get a PCIe 10gbE XFP interface card, but I haven’t found any info on whether or not OS X can handle that kind of card. 2gbE yeah, no problem, but 10gb… Anyone heard anything?