Is this library compatible with VirtualBox's RDP Server? I'm not sure how'd I'd go about checking it, so that's why I'm asking here.
Currently noVNC only supports VNC (RFB).
RDP is possible in the future along with the Spice protocol. Both of those are more complicated than the VNC/RFB protocol.
But probably not in the near term (unless somebody else implements it).
I'm closing this for the moment, as we don't seem to have made any headway on it.
Are there any new info about implementing RDP support?
No, not really. You are welcome to submit patches for this yourself, but we haven't had time/interesting to develop this ourselves.