Well, after seeing one, I couldn't resist. I bought a Zaurus SL-5500 Personal Mobile Tool (a.k.a. a Linux PDA) last week. It is at least partially going to replace my trusty Palm Vx Connected Organizer. So far all I can say is - this thing is REALLY IMPRESSIVE!
Yes, it is very impressive. The color screen is bright, the functionality is great, and the keyboard is ingenius. The fact that it is based on Qt is another plus, providing a very polished environment with lots of KDE apps being ported.
The Yopy is rather intriguing too, but the Z seems to be the first Linux PDA with a chance at the mainstream market. Its smaller size and front light surely helps with that. It is more affordable then the iPaq which is another really great thing.
Infact I only paid $359 for mine from Amazon.com, but right now if you go to BestBuy you'll pay even less - just $319 during the current sale (I'm not sure how long that price will last, then it will return to $399). Anyway, at just 7 oz. it is extremely light, just a bit heftier then my Palm, and it's 206 MHz StrongARM processor with Linux offers so much functionality. If you want a PDA, don't stand here, go get a Zaurus right now!
BTW, to those of you still misled into thinking you should use Windows, the Zaurus comes with two Windows sync programs. In fact, in some type of horrible irony, it is easier to get this Linux based PDA running in Windows then in Linux. sigh