I just love the simple concept of this shelving by Swen Krause. There’s a metal panel that can be mounted to the wall, and the actual shelves are boxes that are held on by magnets (I would imagine they would be quite powerful ones!)- I love how you can move them around as needed- and configure them in any way that fits you and your storage needs! Not sure availability- but his website is here, and I found these images here. (spotted via Wallpaper magazine)