As this is Android there may be a bit of crossover here, but I'm guessing the LAN/Routing community is more interested in this Android application than the general Android crowd.

In email conversions with the guys at Overlook it as been indicated that there will be Ethernet support in upcoming versions of the Android application Fing. Currently any network analysis is done over WiFi when using Fing on an Android device, however this will be extended to Ethernet with the completion of the port to ICS.

A good applications just getting better.