I tried some steps here, but failed: http://wordpress.org/extend/plugins/flowboard/installation/
1. Download the plugin
2. Activate the plugin through the ‘Plugins’ menu in WordPress
3. Create a new board in wp-admin/Notes/Boards (just title is enough)
4. Open a post or a page and click the “note”-button to add a board to your page!
Please, take a look into working video steps: