  We discuss the possibility of spin glass order in the vicinity of the
unexpected metallic state of the two-dimensional electron gas in zero applied
magnetic field. An average ferromagnetic moment may also be present, and the
spin glass order then resides in the plane orthogonal to the ferromagnetic
moment. We argue that a quantum transition involving the destruction of the
spin glass order in an applied in-plane magnetic field offers a natural
explanation of some features of recent magnetoconductance measurements. We
present a quantum field theory for such a transition and compute its mean field
properties.
