With Performance Point Services on SharePoint 2010, Microsoft added a really cool feature that was missing in the previous version. You can now design Dashboard directly in SharePoint (without Dashboard Designer) and to do that you have some very useful Web Part.
One of them is the stack selector Web Part. It allows to display multiple scorecard in on zone and let this WebPart display a dynamic filter to allow users to choose which scorecard they want to display.
Here is the edition mode with my stack Web Part and 2 different dashboards in the same zone:
In view mode, users can now choose which dashboard to display:
