Pinterest today is just like YouTube in 2006.  By that, do we
mean a fast-growing social-sharing property without a proven
revenue model?  No. We mean it's a massive lawsuit waiting to
happen.  Now that Pinterest has raised $100 million and is worth
a notional $1.5 billion, it's painted a big, fat, juicy target
on itself for photographers and other copyright holders to come
after it for allowing users to upload lots of gorgeous, high-
resolution images.  Yes, the Digital Millennium Copyright Act
offers websites which host user-generated content some
protections, as long as they respond to takedown requests.
That's how YouTube defended itself against Viacom, which, sure
enough, sued YouTube for copyright violations shortly after
Google bought the video-sharing site.  And yes, to date
Pinterest has drawn relatively few copyright violations, company
representatives told the Wall Street Journal in February.
That's certain to change, though, especially now that
Pinterest's bank account has grown to nine digits.  P