Thanks, but no such luck here. I'm also using ConTeXt ver: 2013.01.02 18:19 MKIV fmt: 2013.1.2 (the same version as you, fresh from first-setup.sh) and LuaTeX version beta-0.74.0-2012122517 (tex live 2013/dev)(rev 4541). Platform is OSX Mountain Lion 64 bit (Darwin).
fonts > latin modern fonts are not preloaded
languages > language en is active
(hbar-test.tex{/Users/mmurphy/context/beta/tex/texmf-context/fonts/map/pdftex/context/mkiv-base.map}
fonts > preloading latin modern fonts (second stage)
fonts > typescripts > unknown: library 'loc'
{/Users/mmurphy/context/beta/tex/texmf/fonts/map/dvips/lm/lm-math.map}{/Users/mmurphy/context/beta/tex/texmf/fonts/map/dvips/lm/lm-rm.map}
fonts > fallback modern rm 12pt is loaded