All About Microsoft reports that official support for external Ethernet adapters for Surface RT tablets is coming

I asked Microsoft whether external Ethernet support for Windows RT was in the works, and was told the company had nothing to say at this time.

However -- and here comes the good news -- dependable sources of mine close to Microsoft say external Ethernet support is, indeed, in the works for Surface RT. Right now there aren't any external Ethernet dongles that support Connected Standby, the Windows 8 feature that provides instant-on/off whenever network connections are available. But that supposedly is going to change, I hear, possibly as a result of work being done by Microsoft and its hardware partners.

  External Ethernet support coming to Microsoft Surface RTs