My screen resolution was properly detected, as were my network and wireless interfaces, but no networks showing up in KNetworkManager. A quick check confirmed that in fact neither the broadcom-sta driver nor the brcm80211 firmware were installed. So my hardware is recognized as claimed, but not supported.
Should you need to prefetch firmware .debs, to put on a usb-key to transfer the files to another computer, you can download them as either a zip or tar.gz file from http://cdimage.debian.org/cdimage/unoff ... d/current/
and extract it to a folder called firmware, you should see a number of .deb files.
Next download http://packages.debian.org/sid/firmware-linux-free*.deb
and add it to all the other debs in the folder you extracted the non-free firmware to. Then transfer them with the stick to the computer that needs the non-free firmware and:
dpkg -i firmware-linux-nonfree*.deb