I've just installed and tested Alfresco 2.1RC1 Community Edition. A few weeks ago I've watched the 2.1 debut webinar. There, I've seen the very nice fisheye-drilldown feature. How can I enable this feature in my web client?
Go to "My Alfresco" then "Configure" to enter the Configure Dashboard Wizard. You need to add "My Spaces List (My Spaces WebScript)" to the selected components.