  Two dimensional concordance plots involving the baryon-to-photon ratio,
$\eta$, and an effective number of light neutrinos, $N_{\nu}$, are used to
discuss the overall consistency of standard big-bang nucleosynthesis in light
of recent determinations of the primordial deuterium ($^2$H) abundance.
Observations of high-redshift Ly-$\alpha$ clouds have provided discordant
$^2$H/H determinations: one cloud with $^2$H/H high compared with the
previously accepted upper limit on ($^2$H + $^3$He)/H; and one system with a
significantly lower upper bound on $^2$H/H than those previously obtained. The
high value of $^2$H/H agrees well with the current observationally-inferred
primordial abundances of $^4$He and $^7$Li for $N_{\nu}=3$. The low value of
$^2$H/H does not fit well with the current observationally-inferred primordial
abundance of $^4$He for $N_{\nu}=3$. In addition, if the low value of $^2$H/H
is indicative of the primordial deuterium abundance, then significant depletion
of $^7$Li in old, hot Pop II halo stars is probably required to obtain a
concordant range of $\eta$, for {\em any} effective number of neutrino flavors.
The use of conservative ranges for the primordial abundances of $^2$H, $^4$He,
and $^7$Li allow success of the standard picture for $N_{\nu}=3$.
