Sanus VMA401 On-wall Component Shelf is a recently released floating shelf solution designed to hold up to 15 lbs with a very small visual footprint. The nearly flush mount Sanus solution also offers an integrated cable management to hide cables behind the hardware, something you'll want if you're trying to create a clean and uncluttered look. These are available one shelf at a time for about $50.
There also similar models, though without the positionable options of the Sanus above. Here's a fairly good looking Dual DVD Wall Mount Shelf for $73. If you need more than a couple of shelves, the $96 OmniMount Tria 3 Shelf Wall Systembrings you closer to the hi-end Bontempi Casa image you sent in (sans brighter colors); Sears offers a similar 3 tier solution for about the same price. Image: Bontempi Casa, Sanus