Check this out: http://blogs.computerworld.com/netbook_2009_the_four_big_changes
1. <$200 ARM based Netbook on Linux
"Linux has been running on ARM processors for years. What's changed is that both ARM and Linux desktop distributors like Xandros and Canonical, the company behind Ubuntu, are working on releasing full Linux desktops for ARM-powered MID (Mobile Internet devices) and netbooks.
The upshot of these efforts is that by the same time Windows 7 HomePremium will be available on $400 Intel Atom-based netbooks, Ubuntu 9.04 and Xandros Linux desktops will be shipping on sub $200 ARM-based netbooks"2. $400+ Atom based Netbook on Linux or Windows
The Linux ones are $50-%75 less expensive that Windows...
3. Google Android Linux Netbooks