I have a dell poweredge sc440
The graphics work fine with most distros (I use iPC right now) and I have no network. I have the broadcom netxtreme gigabit adapter (bcm5751) and I patched it

To patch the kext, use windows to find your adapter device ID and then put that into the Info.plist. You can find detailed instructions here
http://www.insanelymac.com/forum/ind...howtopic=44152
I almost got it working