  The status of accelerating four-dimensional universes obtained by
time-dependent compactifications of 10 or 11 dimensional supergravity is
reviewed, as is the `no-go' theorem that they evade. All flat cosmologies for a
simple exponential potential are found explicitly. It is noted that transient
acceleration is generic, and unavoidable for `flux' compactifications. Included
is an eternally accelerating flat cosmology without a future event horizon.
