Übertragen is a widget designed to transfer files, be it to an FTP-server, to another Mac running Übertragen on your local network (through Bonjour) or to one of your Bluetooth-devices.
It was designed with quick uploads in mind and thanks to the dashboard it is always available immediately. Just grab your files, call Dashboard, hover over the widget and it presents all your FTP accounts, nearby Macs and your Bluetooth-devices in an exposé-like manner. Too easy.