Kudos to Microsoft for releasing VS 2008 earlier than promised.
If you are a MSDN subscriber, you can get hold of the VS2008 RTM version from the MSDN subscriber download page.
Update: Scott Guthrie has a nice post about uninstalling VS 2008 Beta 2 before installing VS 2008 RTM release. Other great posts include Answers to a few VS 2008 Trial Edition, TFS 2008, and SourceSafe Questions, VS 2008 Compatibility with Older VS 2005 Add-in Packages.
In the spirit of the release of VS 2008 RTM version, a VS2008 Training Kit has been released as well. It is a nice collection (self-extracting, 120MB) of presentations, labs, demos and it installs nicely at one place. It is very intuitive to use with a supporting set of web pages that takes the user through all the available resources. Download it.
You can also enjoy the relevant screencasts on Channel 9: