  We review the properties of z>5 galaxies studied with HST and with the Keck
telescopes, and discuss the detectability of Lyman alpha emission-line galaxies
out to z~6.5 based on these data and ongoing narrowband imaging surveys. The
brightest sources may show (R-Z) color breaks, although the high sky background
at Z (lambda_{eff} ~ 9200 Ang), makes such observations challenging for typical
faint sources. Keck LRIS observations of the z=5 SDSS quasar and z>5 galaxies
observed with HST in the HDF show that the strength of the Lyman break is
evolving more slowly than extrapolations from models at z~3 would predict.
