What a great idea. If you’re having some stairs constructed why not consider this. Handy and hidden, a great storage idea for linen, winter woollies, books and papers, anything small in fact.
P.S. These amazing stairs have travelled all over the blogosphere in a few short weeks. This is a scanned image from the Vogue Living Australia Before+After Autumn/Winter 2007 issue. The true originator of this staircase, the joinery company is named in the comments. If you're in Australia and want one of these then google their name and their address and phone number are yours.