Here’s one of those ideas I would never have thought of, but fortunately Twelve South has.

That space around the back of your iMac: what is it good for?
Not much, so why not put a BackPack on it: a sturdy little shelf that could hold a hard drive or even a Mac Mini (apparently).

Ok, I know this is still a concept but this has been one of the more solid, practical, functional, space-saving idea I’ve seen so far in Q1 of 2009.
The SoundShelf designer (Polish designers Witek Stefaniak and Anielka Zdanowicz ) nailed it when they observe speakers are literally shoved in a corner and adorned with “novelty” [...]