  The lower limit on the age of the universe derived from globular cluster
dating techniques, which previously strongly motivated a non-zero cosmological
constant, has now been dramatically reduced, allowing consistency for a flat
matter dominated universe with a Hubble Constant, $H_0 \le 66 km s^{-1}
Mpc^{-1}$. The case for an open universe versus a flat universe with non-zero
cosmological constant is reanalyzed in this context, incorporating not only the
new age data, but also updates on baryon abundance constraints, and large scale
structure arguments. For the first time, the allowed parameter space for the
density of non-relativistic matter appears larger for an open universe than for
a flat universe with cosmological constant, while a flat universe with zero
cosmological constant remains strongly disfavored. Several other preliminary
observations suggest a non-zero cosmological constant, but a definitive
determination awaits refined measurements of $q_0$, and small scale
anisotropies of the Cosmic Microwave background. I argue that fundamental
theoretical arguments favor a non-zero cosmological constant over an open
universe. However, if either case is confirmed, the challenges posed for
fundamental particle physics will be great.
