Cheap lightweight bed frame

Just found this at Home Depot, for less than $42. Makes a great bed frame, 6' x 3' x 18" high with plenty of storage underneath. All I need is a mattress or piece of foam, preferably latex and a thin sheet of plywood.
workforce shelving.jpg
[http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&productId=100010588&langId=-1&catalogId=10053&ci_sku=10001058][/url]
workforce shelving.jpg
[http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&productId=100010588&langId=-1&catalogId=10053&ci_sku=10001058][/url]