Are you thinking about starting a blog? Are you working, leading, exploring social media as a career? Okay. So if I Google your name, or your Twitter ID I'm going to find... what exactly?
Pinterest is really about sharing an idea, a picture, a whim, a fancy. The transaction behind that idea is a long way off in the mind of 99% of most PINNERS. The IMAGE and the PIN, that's the entire point of Pinterest. A BUY NOW button might just kill the whole thing. We shall see, won't we?
If Pinterest doesn't make itself useful to their users in some way, other than "cute" sharing, it might do fine in the cute cat category, but it won't have much more of a market impact than they Nyan Cat did. Sure, it's HUGE, but for and about what exactly?