Do you want to experience Windows Vista without installing it?. Virtual Techlabs are providing an opportunity to experience Windows Vista Ultimate with SP1. All you need to do is to register by giving your email and other information.It is completely virtual. So it will never affect your system.
They recommend using internet explorer 6 to experience all of its features.
Go for Windows Vista Ultimate SP1 test drive
You can also experience Microsoft Office 2007.
The test drive requires good connection speed.I mean a broadband connection.