  We show how the observable number of binaries in LISA is affected by
eccentricity through its influence on the peak gravitational wave frequency,
enhanced binary number density required to produce the LIGO observed rate, and
the reduced signal-to-noise ratio for an eccentric event. We also demonstrate
how these effects should make it possible to learn about the eccentricity
distribution and formation channels by counting the number of binaries as a
function of frequency, even with no explicit detection of eccentricity. We also
provide a simplified calculation for signal-to-noise ratio of eccentric
binaries.
