Facebook has introduced all sorts of interesting things to social networking culture. It began with a poke, and more recently allowed you to set people on fire (virtually, of course). As of yesterday, users are able to purchase and send virtual gifts (in the form of emoticons) to their friends on the service for $1 each, to benefit the Susan G. Komen Breast Cancer Foundation and promote breast cancer awareness.
The icon set was designed not by Facebook but by Susan Kare who made the icons for the first Mac, including the notorious bomb icon which showed up every time an application crashed. The icons include hearts, cupcakes, and even women's underwear.
The icons can be purchased at the new Facebook gift shop. This marks the first time a paid service has been integrated with Facebook since its launch in 2004.