chrisv1963: I would say that though I am not a lover of pinterest, my customers love it, and I use it everyday for this reason. I've created separate boards for sales, cool stuff, highlights, etc all tied in with facebook and twitter, and it is making a statistically documentable difference in sales. So, if you can use it, really, it is not maybe always SPAM. :)
Also, I have just been trying facebooks new promotions ads, and they have had a tremendous impact on sales.