Having used the origin Xandros Linux on my EeePC 701 for 10 months, I have to say goodbye to it finally.
On boot-up performance, Asus really did a good job on customizing the Xandros Linux. However, this also limited the power of it.
In searching the new OS for my EeePC, EeeUser should be a good place to start with. Among the customized EeePC distributions, three of them draw my attention, they are:
By using unetbootin, it is just a 3-click process to create a bootable SD card from the liveCD image. No more burning of CD-Rs 
and make testing and switching between distribution become easy.
After playing the three liveCD for a short while, below is my short comment for each distribution:
OpenGeeeU
- it combines Ubuntu 8.04 with Enlightenment
- fancy desktop
- the slowest among the 3 distro
eeeXubuntu
- Xubuntu 7.10 based
- clean and familarized UI
- fastest among the 3 dirstro
Ubuntu EEE
- Ubuntu 8.04 based with Netbook Remix interface
- a bit slower then eeeXubuntu
