Mini-laptops as a concept just plain do not excite me. Maybe it’s because I’m 38 and the eyes don’t work so good anymore, but when I’m told 7” screen I think unusable over the long haul.
It would depend on how you would use it.
My husband has had several PDA's. He loves them because of their fast on/off, they'll run Power Point and their tiny size. We've been looking at the Eee for a couple of months, and see it as an "inbetween" machine for a PDA and full laptop.
He's maxed out the capabilities of his PDA. New memory cards can help only so much.