  For an attractive class of dynamical symmetry breaking (technicolor) models,
the lightest neutral pseudo-Nambu-Goldstone boson ($\pzero$) contains only
down-type techniquarks and charged technileptons. We discuss the prospects for
discovering and studying the $\pzero$ of such models at the Tevatron and the
LHC and at future $\epem$ and $\mupmum$ colliders. Depending upon the number of
technicolors, $\ntc$, discovery of the $\pzero$ at the Tevatron and the LHC in
the $gg\to\pzero\to\gam\gam$ mode could be possible over a wide range of mass.
For $\ntc=4$, discovery of the $\pzero$ at an $\epem$ collider via the reaction
$\epem\to\gam \pzero$ should be possible as long as $\mpzero$ is not near
$\mz$. In the $\gam\gam$ collider mode of operation at an $\epem$ collider, the
$\gam\gam\to\pzero\to b\anti b$ signal should be very robust if $\ntc=4$. For
the minimal $\ntc=1$ case, detection of the $\pzero$ at the Tevatron and in
$\epem$ collisions will be very difficult, and the precision of measurements at
the LHC and the $\gam\gam$ collider decline markedly. A $\mupmum$ collider
yields a $\pzero$ production rate that does not depend markedly upon $\ntc$. At
a $\mupmum$ collider discovery of the $\pzero$ as an $s$-channel resonance
should prove possible via scanning, even if it has not already been detected
elsewhere. Once $\mpzero$ is precisely known, operation of the $\mupmum$
collider as a $\pzero$ factory will allow precision measurements of enough
observables to determine the number of technicolors of the theory and (up to a
discrete set of ambiguities) the fundamental parameters of the low-energy
effective Lagrangian describing the Yukawa couplings of the $\pzero$.
