Paper is Drobox take on notes. Browser-based notetaker with mobile apps for iOS and Android. It's lightweight and collaboration centric design makes it ideal for team use. It´s markdown based, but provides a WYSIWYG editor complete with hotkeys and popup toolbar for formatting. The design makes it easy to use for novice and expert users alike.
Pro Links to files instead of importing them
It's Dropbox. For those of us who have come to rely on Dropbox to sync files between devices, it's nice to know that the document you see in your notes is the same version you see in your folders. Changes made in 3rd pary apps are reflected in your notes immediately.