I'll let them say it, because they've said it best:
The font consists entirely of ampersands, to represent the idea of people coming together to help one another. Type designers, graphic designers, and other artists from around the world contributed artwork to the font.
The font is being be sold for $20US and is available through font distributors Ascender Fonts, Veer, FontShop, and MyFonts. All proceeds from the sale of the font will go to Doctors Without Borders, to help with their relief efforts in Haiti.
The “Coming Together” font contains over 400 glyphs and is supplied as a single, cross-platform OpenType font. All glyphs are accessible using OpenType-savvy applications, Unicode-savvy utilities, the Character Map utility on Windows, and FontBook on Mac OS X.
There are a ton of great little bits and bobs in this font set, and if you're thinking of donating to the Haiti disaster funds and haven't yet (or have the wampum to do so again), it's a great way to donate and support these art-based charity actions at the same time.