Traveling the internet I came across a most excellent site, Descending Ashtray. While flipping through it with the enthusiams of a kid with a new comic book, I found this entry for the Dual Drill. Never having seen this before, I must agree it looks like a clever idea, but I would think, that it just wouldn't be sturdy enough with the rotating head and extra mechanism.
I'll stick with my drill, the Black and Decker Firestorm. Not only did it come with a charging station that is also a radio, but the drill head smaps off to reveal a (changable) screw-driver bit underneath. Works great for me. Plus I bought it at a charity auction for a great price! I wanted to show a picture of it, but after compositing three different pictures (the base, the drill and how the head comes off) I figured, "Hey, that would make a pretty cool animated GIF!". So here it is, my first GIMP animation:
The Black and Decker Firestorm Drill. Animation done in the GIMP.