You can clone with
HTTPS or Subversion.
Would it be useful to have contributed glyphs for Font Awesome? If so, could you post preferred formats/apps to use in the README.
That's really a bit tricky because there're so many settings involved during creation and making a glyph e.g in a vector app really is only the first step. The next steps involve even more settings depending on the font software used (which starts at around $500)
Interested in contributing myself. Some of these icons (key, group, cloud) could really use a little cleaning up. Being as it's as simple as Illustrator > Fontographer > Fontsquirrel, I'm sure a few of us could make our own and either have them replace the defaults or just offer them as alternative forks, especially for the one-offs/scope-creep ones people keep asking for.
Edit: So you can totally do this for free (without the expensive type software) using Inkscape's glyph tool, freefontconverter.com and FontSquirrel.
The formal process is in 3.0. Let me know if you have any thoughts or comments.
I don't see it there but I found it here. http://jib.li/s/lib/fontawesome/docs/#contribute
@caffinatedmonkey that's old stuff, at the moment dave is not accepting pull requests containing icons