Looks like SQL Server 2008 Cumulative Update 3 is available for download to keep your instance of SQL Server 2008 up-to-date with fixes and patches.
The only thing that pops-up in the list of fixes that I have experienced as a user is the one involving SQL Server Management Studio:
“FIX: You may experience issues when you try to expand the Databases node in SQL Server Management Studio, or the sp_spaceused stored procedure takes a long time to run in SQL Server 2008”
Heck, I get that problem all the time. That fix alone is worth installing the Cumulative Update 3 for SQL Server 2008 :)
If you are interested in the update, learn more here.
SQL Server 2008 Tutorials