We're not saying Pinterest won't help your business--it very well might, especially if you're in retail, design or travel. But make sure you're being smart about it.Have you heard about Pinterest, the latest social media darling? It's already surpassed 11 million user accounts and leading to no fewer than a dozen news headlines a day right now:"How Pinterest Helped Clean a House -- and Save a Marriage""Can Pinterest Save You Money?""Mitt Romney's wife gets patriotic on Pinterest"The hoopla is getting ridiculous ... and not just a little annoying.All About PinterestTo educate those still unfamiliar with Pinterest, one only has to recall high school days of yore, when high school locker doors were decorated with full-color clippings of favorite things: teen idols, sports figures, fashion looks, candy bar wrappers and tropical environs