I have come to a few conclusions with the Asus eeePC 900A I got for a song ($150).
Stats:
9" LCD 1024x600
1.6GHz Atom processor
2GB RAM (1GB stock)
4GB SSHD
xubuntu 8.10
1. With xubuntu 8.10 it is more reliable than the stock Xandros
2. I like xubntu: not as fancy or resource-hoggy as ubuntu (gnome) and kubuntu (KDE)
3. Bump the RAM to 2GB, not necessary, but subjective experience is snappier
4. Almost good enough to show HD video, but not quite. It is a little choppy. SD is fine
5. SSHD is small but snappy. I use no swap partition.
6. 9" eee LCD screen / keyboard size is fine for viewing web sites, but just a little too small for my paws to comfortably type without numerous typos. FTR, I am 6' tall, wear XL gloves
7. Wireless works great & strong.
8. All hardware works just great except for the built in microphone, which I haven't got to work, yet.
9. On-board sound is damn good for such a small device
10. Battery life beats any of my other lappies I have had experience at 2-3+ hours.