My Aunt, Terry,told me about this.

"Cheaper upgrade price, subscription to MSDN Seeking to encourage upgrades to its upcoming Visual Studio 2010 IDE, a Microsoft executive has detailed a promotional offer intended to prod users of the Standard Editions of Visual Studio 2005 and 2008 to move to the new platform. The company also is offering a preordering option for Visual Studio 2010, which is set to launch on April 12."