All links on the Microsoft website are now redirected to the 2008 release. The problem is that the new version will not link to C libraries created with the 2005 release.
This post says it
http://apdubey.blogspot.com/2009/04/microsoft-visual-studio-2005-express.html
If you have a MSDN license, they are all available: http://msdn.microsoft.com/en-us/subscriptions/cc137115.aspx