I’ve been asked more than a few times recently how you can set the default page in the new Team Foundation Server 2010 project portal dashboards. Depending on which version of SharePoint you’re running a default dashboard is pre-selected for you when you create a new team project. If you’re running WSS, the default is set to the Project dashboard. And if you’re running MOSS, the default is set to the Burndown dashboard.
To change the default dashboard to something different you simply need to set the default page for your site. To do this, click the Dashboards document library link from the quick launch menu.
Next, select the dashboard that you’d like to set as the default dashboard for the portal and open the action drop down. Click Set as Default Page.
Navigate back to the root of your project portal and the dashboard you selected is now the default page shown on your portal.