I'll be darned; the site does indeed seem to have gone kaput.
Anyway, the "Flexy" is simplicity itself: three (or four) heavy threaded rods (I used 5/8") with shelves held by hexnuts and washers. Three legs is easier to level and sufficiently strong. Don't know about the WAF as it's kind of industrial looking IMO, but I built one & like it. See
my Website for pix. Should be self explanatory. Alas, the cool green stonelook material I used, a type of MDF, is not easily available to DIYers. It's called "Environ". (If anyone knows of a distributor that sells small quantities instead of pallet loads tell me! It would make kicka$$ speaker cabinets!) I used to get it when I was in the sign biz.
In store bought stands Bell'o makes handsome modern units.