I've created my first Dashboard Widget. It's a MiFi signal strength / battery state widget. Whenever the mac is connected to the MiFi, this widget will display the signal strength and battery state. It's marginally easier than opening up a web browser.
I'm not a graphics wizard. All of the graphics in here I stole off the net using Google. Mea culpa.
You can download the widget here. Just unzip it and double click to install.