Be sure to start SQL Server 2008 Reporting Services Configuration Manager and check out the new default virtual directory name. Notice that the team has finally changed the name to be IIS standard notation. No longer will you see MyServer$MyInstance as the VD name. Now it's MyServer_MyInstance.
More tips to follow...
When you open an existing RDL report, you'll find that Visual Studio's BI tools convert it automatically to the new "Tablix" control. Unfortunately, each cell (which used to show the first part of the expression being rendered) now shows "<<expr>>". This, IMHO, is a step back. Now you have to open a property window and drill in two layers to inspect the setting.
