A place to start is in the console’s installation folder. I think there were some example dashboards, and at least one .js file defining the functions you can call from the dashboard (I’ve found ImportXMLtoSite() to be especially helpful for creating new baselines and taking actions).
Look for .OJO and .JS files. OJO is an xml format for console display options, and a CDATA [[ containing the html “body” of the dashboard.
The html can utilize javascript, css, flash, etc.