Thinstall is working on new 3.2 plaform, which will introduce remarkable capability to virtualize multiple Internet Explorer versions.
All application virtualization vendors are currently offering capability to isolate and deliver multiple browser versions on the same plaftorm, including FireFox and Opera, but virtualizing Internet Explorer is a a more complex task because of its tight relationship with Windows.
Thinstall 3.2 will provide such capability as this webcast demonstrates (IE5, IE6 and IE7 on the same OS).