Comment by MarkMc

This is little 'scratch-your-own-itch' project I started working on about 9 months ago. Front end is GWT, back end is Java servlets. Database was originally MySQL but switched to Prevayler for performance reasons.

My YouTube video gives a nice overview of the benefits of a virtual whiteboard: http://youtu.be/MDEHFHG1l3Y

What does Hacker News think?