In TFS 2008 the Web Access was a different installation and it came as a Power Tool to the TFS.
In TFS 2010 the Web Access is installed automatically and is part of the TFS.
In order to get to the Web Access in TFS 2010 do the following:
In your preferred browser type:
http://[YourServerName]:8080/tfs/web/
YourServerName is the tfs name for example: http://tfs-srv:8080/tfs/web/
Or you can get to it from the Team Project SharePoint Site:
Have Fun!!!