As another long-time Diigo user, I'd love to hear more about your experience with Pinboard and how it compares. Although I have a large library of links with Diigo, I'm worried that the product doesn't seem to be getting updates or improvements. Services that stagnate like that are prone to disappearing.

How well does Pinboard fill that need for you? Did you look at any other options before you decided on Pinboard?