The search feature in the showroom does not work for some words - I am guessing it rejects common or short words. This is misleading because there is no indication that search terms have been dropped. For example, seach for "pen" gives "Search results for: pen (0 items)" whereas there are in fact many items with this term in the title or description. Seaching for "pen" by tag http://www.ponoko.com/showroom/all/pen gives 8 results.