This is some serious fun... I just downloaded this today. I work for Sherwin Williams and I didn't even know this existed until last weekend when a friend (non-SW employee) mentioned it to me. (I know, I know, I must have missed the memo...) It is available for iphone, blackberry and android.
Take a pic, pick a color in your pic and viola!, it tells you the Sherwin Williams color code. It even has a find store feature! Ask How, Ask Now...Ask Sherwin Williams... Amazing what will they think of next?!