We've used a similar corner shelving unit to create space in a small 7 by 9 ft room. It's a great, easy shelving solution for small spaces (although installing it was a bit tricky as the walls weren't plumb.
Staircase storage - Simple version for under stairs storage. This would totally work if we gutted the basement as it is now. (Plus, no more dark crawling under the stairs to get at my christmas decorations!