I've done some research. It seems that many people struggled with Broadcom USB NIC's several years ago, but now I don't see a lot of topics asking for help. It's definitely not a "plug and play" success for me; the computer recognizes that it's a D-Link USB device.
However, it doesn't show up in the network connections dialogue, and I get this message when I run lsusb :
Bus 001 Device 004: ID 2001:3315 D-Link Corp.
I've had a really hard time understanding what I'm even looking for. The Broadcom website references a "one size fits all" driver, tg3, and I'm not quite sure how or where to d/l that from - it seems like it should already be included with the default linux kernel. I tried using b43 fwcutter with very little success. Any ideas what I'm doing wrong?