Run Debian on your Eee PC
While Ubuntu is feverishly working on modifying its distro to work on small mobile PCs and other miniature devices, Debian has been working on making its GNU/Linux distribution easily installable on the Asus Eee PC.
Earlier models are better-supported, but the team involved is aiming to make every Eee Debian-friendly:
Naturally, the earliest DebianEeePC/Models are supported best, but full support for all models is not far off. In particular, the 701 is very well supported, the 900 is almost entirely supported and we have some users reporting success on our mailing list with the model 901. Aided by their participation, we will soon support the 901 and other Atom-based models (1000 and 1000H). When the 904HD and 1000HD become available to us, we will expand our support to include them too.
While the Eee's "original" OS, namely Xandros, is based on Debian, it's not of the same "free" ilk. Whatever that means to you, if anything is one thing, but I've found over the past year and a half that Debian runs pretty darn well on more systems than most Linux distributions and is very flexible, so it may be well worth trying on your Eee.
The biggest problem using Linux or BSDs on hardware they don't ship with is ACPI support (power management, turning the machine on and off via the menus, controlling the various fans) and networking (wired and wireless).
I read a while ago that the Eee might ship with Debian at some point, but talk about that has cooled considerably, and now it seems that Asus is more keen on shipping Eees with Windows and not even Xandros.




> now it seems that Asus is more keen on shipping Eees with Windows and not even Xandros
Indeed - at least here in Europe, you still can't get the 901 20G with Linux pre-installed, which is sad.
So I'm contemplating about trying the Acer Inspire One instead. At least it ships with *some* free OS (Linpus)...