  We study the potential benefits of an iodine-based solar-neutrino detector
for testing hypotheses that involve neutrino oscillations. We argue that such a
detector will have a good chance of distinguishing the two allowed regions of
$\Delta m^2$ -- $\sin^22\theta$ parameter space if neutrino conversion is
occurring in the sun. It should also be able to detect seasonal variations in
the signal due to vacuum oscillations and might be sensitive enough to detect
day/night variations due to MSW transitions in the earth. Although it would
need to be calibrated, a working iodine detector could be completed before more
ambitious projects that seek to accomplish the same things.
