I have secured my invitation, and after removing as much identifying information about myself from Facebook and locking down everything else (Seen only BY ME!), signed in with Facebook.
And I just don't care.
Sure, there are pretty pictures, and there are some lovely book people using it, but it's just one more thing that requires a computer to use. I don't like being on the computer. It's work.
Any truly compelling reason for me to care about Pinterest?