According to the MSDN Subscriptions WebLog we can expect to see Visual Studio 2008 to be downloadable early next week.
“Visual Studio 2008 is anticipated out early next week, with availability for Subscribers. Check out the "Top Subscriber Downloads" area on http://msdn2.microsoft.com/subscriptions for VS 2008 downloads.
You will also be able to access these downloads by clicking on the Subscriber Downloads and Product Keys links that take you to all of your downloads. ”
(source: Ken Cox)
That would be great and just in time for a session I'm doing Friday on 'what's new in Visual Studio 2008'. More details on that here: http://www.newhorizonslearning.nl/New-Horizon-s-Developers-day.554.0.html (it's Dutch).
update: RTM has been reached and VSTS 2008 can be downloaded (source).