In case anyone comes back here looking for working NIC drivers after Lion upgrade..
I had upgraded from SL to LION and original BCM5701 drivers from this thread would fail to load.
after extensive searching..
found that the Dell 580 MT has a broadcom onboard NIC w/ Device id of 1691
replaced with this one, modified info.plist to show 1691 , reset permissions and worked on first try..
Type: Ethernet Controller
Vendor ID: 0x14e4
Device ID: 0x1691
Subsystem Vendor ID: 0x1028
Subsystem ID: 0x0438
Revision ID: 0x0001
Link Width: x1
BSD name: en0
Kext name: AppleBCM5701Ethernet.kext
Firmware version: 255.255
amfblufferMember Since 23 Jul 2011
Offline Last Active Jul 20 2014 04:32 PM
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