Could someone tell me, is it possible in Diigo, to send short message to friends, or even other Diigo users?

I really wanna know, how well is the concept of "collaboration" defined. I got difficulty to build any relationship within like-minded people, except for building groups(too basic forum-function, also rarely used).

I am also awaiting the To-Be-Added "multiple colors" feature

gdwarner wrote:
> I also need multiple colors for research. I hope the feature is implemented in the future.

cevanoff wrote:
> I am with you on this one. I really need the option of highlighting in different colors. Are there plans to add this feature?