Engadget suggests that more Asus EEE PC's are on their way. As a happy owner of the 701 and 900 (actually two of each) I find these to be the perfect toss in the bag and carry around or leave in the car for when you need more than a Blackberry.
I'm using the Linux versions with all the free apps, but likely will make a Windows model my next purchase as I'll be able to do more mainstream stuff on it. Of course that will increase the Total Cost of Ownership too.
What's my dream machine? A Mac on the Asus or Flybook size platform.