Edits... edits EVERYWHERE...
After attempting to make them work, I'm no longer a fan of network cards based on the National Semiconductor DP83815 chipset (found on the Netgear FA-311 card). Unless you like poor performance, "Something Wicked Happened!" (read 'rare error codes') filling up the logs, and an obscene amount of transmit errors.
Replaced them with FA-310 cards (based on the tulip
Sanity partially restored. :)