
There's 2 ways to download it. The normal way, using the FTM and navigating through the tree-view in the subscriber downloads. Currently only the full Team Suite edition is available that way - they're staggering the availability of the editions using this method.
The other method is to use the 'Top Downloads' section on the MSDN page which includes every edition of Visual Studio 2008, including the MSDN Library and Team Foundation Server etc. This uses the Akamai Download Manager (remember to enable pop-ups!). Bit weird results with IE7 and Vista (check C:\Users\<user>\AppData\Local\Microsoft\Temporary Internet Files\Virtualized\C\Users\<user>\Documents\Download for the actual place it gets downloaded to). Worked better with Firefox on Vista.
I prefer the FTM method as it seems far more reliable, however the Akamai version gives far better and consistent download speeds.
So far, since lunch Monday, I've downloaded VS2008 Team Suite (x3), VS2008 Team Foundation Server, VS2008 Pro, VS2008 Express Editions, and VS2008 MSDN Library. So it's definitely working.
Glad they shipped this month - my free Team Suite subscription runs out on the 31st - hence the manic downloading!