  For uniform arrangements of magnetic fields, strings, or domain walls
(together with the cosmological constant and non-relativistic matter), exact
solutions to the Einstein equations are shown to lead to a universe with
ellipsoidal expansion. We argue the results can be used to explain some
features in the WMAP data. The magnetic field case is the easiest to motivate
and has the highest possibility of yielding reliable constraints on
observational cosmology.
