ASUS released information about its Windows 7 Upgrade program, you can read it over here.
We are pleased to announce that we will be offering the Windows® Upgrade Option Program to our users. Users who purchase a qualifying ASUS desktop PC, notebook, EeeTop PC or Eee PC™ during the eligibility period from June 26, 2009 through January 31, 2010 will be eligible to receive their Windows® 7 platform upgrade kits after the Windows® 7 General Availability Date.
Users will be able to upgrade from Windows Vista® Home Premium, Windows Vista® Business and Windows Vista® Ultimate to a corresponding Windows® 7 operating system (see Figure 1), while users who purchased eligible PCs and downgraded their operating systems from Windows Vista® to Windows® XP operating systems are also eligible for the upgrade program. The upgrade will be available in the languages listed in Figure 2.