Correct, all available documentation is at http://www.voipo.com/help which is also accessible by clicking the Support link in the top nav menu of any page on our VOIPo.com site. The Star Codes are linked on the homepage of that as a "Featured Article" in the knowledgebase.

Once the new version of vPanel is released, new, more comprehensive documentation will be posted. It also has things like help bubbles you can mouseover with a description of functionality, etc.