Wouldn't it be great if we could check the stats of how many people visit our annotated pages? Two ways to do this:
(1) Provide the option somewhere in settings to authenticate to bit.ly API (or another shortening service that provides analytics). Check out how TweetDeck does this. In this case, nothing changes visually in Share dialog, but now, I can visit my account in bit.ly and check who visited my Diigo bookmarks. Cool?!
(2) Another alternative would be to add analytics to your Diigo's own shortening service. It would be nice if the url were shorter. Maybe http://d.go or something similar?