Very good suggestion. We've actually been looking at something like this to add to ProtoShare. Right now, however, we have no technical way of sharing these items yet. We are in the planning stages for how to accomplish the sharing of clippings and templates, etc. (a library, basically).
While this does not help you today, if you feel you've come across any tips or tricks for using ProtoShare, feel free to post them to the Forum.
Thanks for your feedback!