Just a quick update: Font Awesome has been updated to 4.1!
You can check out the update notes over on GitHub, but a major change for the cheat sheet posters is the inclusion of 71 new icons. For now, we'll be putting sale of the Font Awesome poster on hold until I can update the design to include all the new hotness!
Don't fret; it'll be back in a week or so. Congrats to all the contributors over at Font Awesome on the release.
Ps. Oh, almost forgot; I'll also be updating the Digital Cheat Sheet version of Font Awesome too.