The current fontawesome package is not yet updated to the version 3.2.1 of Font Awesome. I'd like to manually select some of the new icons. Merging some snippets i have come up with this:
%!TEX TS-program = lualatex
%!TEX encoding = UTF-8 Unicode
\documentclass{article}
\usepackage{fontspec}
\usepackage{fontawesome}
\def\faTwitterBird{{\FA \symbol{"F099}}}
\def\faCalender{{\FA \symbol{"F133}}}
\def\faXing{{\FA \symbol{"F168}}}
\begin{document}
- \faTwitterBird - \faCalender - \faXing
\end{document}
Unfortunately, it does not display one of the newer icons (e.g. xing).

/usr/local/texlive/2013/texmf-dist/fonts/opentype/public/fontawesome/FontAwesome.otf. Replacing this one yields the wanted result. Is there actually a better way to load the system font instead of replacing it in the package? – bioslime Aug 02 '13 at 09:22