The Linksys compact USB 100M ethernet works without even a powered hub. You need to manually do "ifconfig eth0 inet xxx up" or "udhcpc eth0" to enable and/or get the address.

WiSpy works too, though I've had lockups. But the programs work, e.g. I've compiled the GTK version (non-hildonized) and it works:

http://homepage.mac.com/tz1/.cv/tz1/...ol_gtk-zip.zip

You will likely need to do "chmod +x spectool_gtk" after extracting it for it to work.