The Inspiron 11z is an interesting machine. It has an 11.6 inch, 1366 x 768 pixel display and a 1.2GHz Intel CULV processor and integrated Intel GS45 graphics instead of the usual Intel Atom/GMA 950 graphics we see in 10 inch netbooks.
Frank reports that the laptop is very thin and light, weighing just about 3 pounds with a 3 cell battery. He reports it gets about 2.5 hours of battery life, which isn’t stellar. But if and when Dell offers a version with a 6 cell battery, it seems likely that you should be able to get 5 or more hours of run time.
You can read more in the forum.
The Inspiron Mini 11z is available from Dell for $399, although Frank points out that if you know anyone who can get you an employee discount, the price comes down to $359.