wow a fellow Asus 701 Eee owner.
I have 2 Asus 701 Eee PC's ! Both are the first 2GB models (which are the hardest to do anything with due to the SD drive space). They were shipped with a custom OS build of Xandros... which is now basically impossible to upgrade without running out of space ! Even if you remove all the apps.
If you have a 4GB model then you can follow this guide to enable full Xandros KDE : http://wiki.eeeuser.com/howto:getkde
Make sure you fix the SSL vulnerability as well, the guide is full of cool stuff. http://wiki.eeeuser.com/
Don't even attempt this on a 2GB model, because you will need to sudo apt-get update , sudo apt-get upgrade etc. and even if you remove OpenOffice, FireFox etc, etc you will still run out of space !
I would strongly recommend that you ditch the custom OS and install eeebuntu: http://eeebuntu.virginmedia.com/
I have installed and run the Eeebuntu 3.0 LXDE Beta1 edition on my 2GB, added / removed some ubuntu repos and turned mine into a Tor Server - lol
I didn't install a swap partition and it has well over 1GB of free space !
This will be your best option for all the correct drivers, repos and max free space.
Good Luck !
P.S. It will give you a headache.