Box.net has one of the best apps on Facebook right now, because it’s so open-ended. Their Files app stands out amid the Facebook app frenzy because it lets you easily share music, video, photos, images, documents and whatever else you can think of via one handy box.

Well, turns out it’s not just for Facebookers. Widgets are the sixth element, haven’t you heard? Bear witness below.

The downer: videos don’t stream in the widget, unlike in their demo.

UPDATE: But Flash video (.flv) does.