MSNBC Reviews the Sharp Zaurus
Khalid sent in a link to this review of the Sharp Zaurus. They only noted a few flaws, such as the synchronization being harder than necessary, and generally seemed to like it, at least better than the Wall Street Journal columnist did.
For developing custom applications very quickly, the zaurus kicks booty, but it would be irresponsible to suggest to someone the zaurus as something you could use for phone numbers or schedules, no matter how many other cool features it has.
Note: Right now, the linux community is in hardcore denial about usability problems in general, and any attempt to deny the truth of this post only further proves the truth of it.
Ergonomica Auctorita Illico!