Being able to quickly and easily collect all sorts of materials, designs, references, links, diagrams, etc, and have a permanent, shareable repository is HUGE for teams.
An indispensable tool for conveying a design. I recall the primitive days when we used to share files of flowcharts of this or that office package... this is such an upgrade and so much easier to collaborate. can even see the mouse of my colleagues without having to share the screen.
