Well it looks like SQL 2008 RTM’d at TechEd in South Africa. Take a look at Aaron Bertrand’s post or sqlmag
Resource Governor enables you to manage SQL Server workload and resources by specifying limits on resource consumption by incoming requests. In an environment where multiple distinct workloads are present on the same server, Resource Governor enables you to differentiate these workloads and allocate CPU and/or memory as they are requested, based on the limits that [...]
The Transact-SQL debugger in SQL Server Management Studio enables you to find errors in Transact-SQL scripts, stored procedures, triggers, and functions by observing their run-time behavior. You can start the debugger when you are using the Database Engine Query Editor window. By using the Transact-SQL debugger, you can do the following: Step through the Transact-SQL [...]