  We examine the Big Bang nucleosynthesis (BBN) process in the presence of
small-scale baryon inhomogeneities. Primordial abundance yields for D, He4,
Li6, Li7, Be9, and B11 are computed for wide ranges of parameters
characterizing the inhomogeneities taking account of all relevant diffusive and
hydrodynamic processes. These calculations may be of interest due to (a) recent
observations of the anisotropies in the cosmic microwave background radiation
favoring slightly larger baryonic contribution to the critical density,
Omega_b, than allowed by a standard BBN scenario and (b) new observational
determinations of Li6 and Be9 in metal-poor halo stars. We find considerable
parameter space in which production of D and He4 is in agreement with
observational constraints even for Omega_b h^2 a factor 2-3 larger than the
Omega_b inferred from standard BBN. Nevertheless, in this parameter space
synthesis of Li7 in excess of the inferred Li7 abundance on the Spite plateau
results. Production of Li6, Be9, and B11 in inhomogeneous BBN scenarios is
still typically well below the abundance of these isotopes observed in the most
metal-poor stars to date thus neither confirming nor rejecting inhomogeneous
BBN. In an appendix we summarize results of a reevaluation of baryon diffusion
constants entering inhomogeneous BBN calculations.
