SQL Server 2008 Feature Pack, don't forget to install them as well
Its over 2 weeks that SQL Server 2008 RTM is released and no doubt in stating that many DBAs might have performed downloads from their MSDN/Technet subscription to install within their environment.
Remember feature pack download for SQL Server 2005 couple of years ago, in the same situation you have to be aware about such pack of installation which will have a collection of stand-alone install packages that provide additional value for your SQL Server 2008 management. They consists redistributatle components, add-on providers and backward compatibility components too.
This SQL-2008-Feature_Pack download link gets you there to choose what kind of feature pack you need to install within the existing SQL Server 2008 platform. For the sake of clarity you can download the appropriate file by clicking the links on that page and then run the downloaded file to install that package. Not only that the classification of package that is required or intended are marked as Customer, Partner, Developer to indicate that which package suits for which audience.
Last piece of word is don't forget to download and test them before you deploy as a whole in to your new 2008 Production environment, you never know it may hit a problem and be proactive to solve such teething issues.