Swap + Flash Usage
I got one of these for my wife to do some light browsing and check her email from the sofa - works amazingly well for those uses.
About the previous comments:
There's no swap at all - and you don't really need swap space on Linux to run the type of apps that are on the Eee anyway.
2GB vs 4GB:
I expect they've simply removed the restore partition that takes up quite a bit of the flash on the 4GB version (it's not really needed anyway, as you can restore the OS from a USB key or external DVD drive anyway).