If you want to buy a netbook/laptop/ultramobile, look for processor specs that provides a virtualization support early on. So, if you intend to upgrade to Windows 7, you will have chance to use its Windows XP mode that comes with certain Windows 7 editions (Professional, Enterprise, Ultimate).

A few Intel's Atom Z5 series (codenamed Silverthorne) do support VT.

To check for virtualization support, you can use the given link:
http://www.grc.com/securable.htm

This post has been edited by eclectice: May 1 2009, 11:24 AM