Each portal will require a relationship linking an occurrence of that table to the occurrence specified in Layout Setup | Show Records from in Layout setup. If you use the X operator instead of =, you can select any pair of fields as your match fields and the portal will display all records from the portal's table.
I did a search for Dashboards
Misplaced some links
this is one I have http://www.anvildataworks.com/?p=554/
sorry, maybe not so helpful
Very helpful! Thanks guys. I have some learning to do.