2 happy eeePC users
I've had mine for 2 weeks and my gf has had it for about a week now and I must admit that we both love it!
Hers is running XP + Office 2003 and it's ideal for her report writing and checking email. (After customisation, XP took up just over a 1.2gig on the SSD).
Mine's running Ubuntu (around 2gig in size) and Compiz-Fusion works very very well on this tiny machine... There's a youtube video of someone showing off Compiz on the eeePC somewhere.
The battery life is a tad shorter on these OSe's, but enough for one or two sessions when you're out and about. Anyway, reports are that ASUS will bring out an 6 cell extended battery which I'll happily outfit the eeePC with and still not complain of the extra weight!
At the end of the day it's a small portable laptop that you can easily carry around, can be customised with your own OS, quick at the programs it was intended for, and a compromise to travelling with a conventional laptop considering the price involved.