This is new discovery for me linoit, a web sticky note service that lets you create a canvas for post-it type sticky notes. A giant online whiteboard for collaborative planning. I know you can use prezi for similar things, but I think linoit is rather cool.
Here's something else similar: wallwisher. Therse are free or upgradable to pro versions.
I'm already learning about lots of new tools from my new colleagues at #edcmooc, hope to share some of my resources here on my blog.