Just to let people know, I'd thought I'd try the USB Ethernet adapter I had kicking around:
http://www.belkin.com/IWCatProductPa...duct_Id=281799

After a few false starts (you have to have a network cable plugged in and linked, otherwise it doesn't create eth0) I can happily say it's working.

Once again, great job guys! You've made a amazing phone even more amazing.