Alright. Listen Up! this looks pretty awesome. In case you haven't noticed yet, that is a Shotgun-Nintendo-Revolution-Controller-Attachment. Now just don't get all excited, it doesn't exist, it's just a rendering, but the guys at IGN have an article about this.
We've all been thinking about all the possible applications for that controller, cause it sure add another level.
Y'know what would be awesome too? A Nintendo Revolution Megaman Megablaster!!! Hell Yeah! I wish I had some time on my hands to do my own 3d rendering.

Controller Concepts: Gun Games