I've been working on enhancing the chatbox with the ability to directly share charts/images without the need to go to an external site.
The idea is to show a thumbnail version of the chart directly in the full-pane view of the Chatbox (not the mini-view), and to also show a list of the most recent charts uploaded at the bottom of the page (or similar idea, still working on this).
When you click the thumbnail the full chart will open in a new window.
This isn't ready for prime time yet, but wanted to share...