  We consider a cosmogony with a dark matter component consisting of a network
of frustrated domain walls. Such a network provides a solid dark matter
component with $p=-(2/3)\rho $ that remains unclustered on small scales and
with $\Omega_{\rm dw}\approx 0.7$ can reconcile a spatially flat universe with
the many observations indicating $\Omega_{\rm m}\approx 0.3.$ Because of its
large negative pressure, this component can explain the recent observations
indicating an accelerating universe without recourse to a non-vanishing
cosmological constant. We explore the viability of this proposal and prospects
for distinguishing it from other kinds of proposed dark matter with significant
negative pressure.
