Hi Doug,
You seem to have tried just about every neat hand-held electronic device out there. :-)
I was at a meeting with someone who had a small Fujitsu Lifebook. I think it was a [link|http://webshop.fujitsupc.com/fpc/Ecommerce/buildseriesbean.do?series=P2|P2000]. I don't know if it was the 30 GB version with 802.11b, but it seemed like a very capable machine. The owner used it for a Powerpoint viewgraph presentation.
It seems quite comparable to the U1, but has a larger screen, has (the option of) a 30 GB drive, and it comes standard with a CD-RW/DVD drive. The Fujitsu lists at $1699 with 30 GB (in the US). It weighs 3.4 pounds. The Sony has FireWire and Memory Stick interfaces that the Fujitsu doesn't, as expected, but with networking I don't think that's a terrible limitation (at least if it's used on a network with those ports available.)
The latches on the Fujitsu did seem to be quite dainty, so I don't know how resistant it is to real-world handling.
I'd be interested in your take. Thanks.
Cheers,
Scott.