Jason Dunn at Smartphonethoughts.com just posted a really interesting "real-world review" of the HTC S640 on Canada's Telus. For the review, Jason's wife used the phone for a while, and then told him what she thought of it. This is a pretty in-depth article with lots of interesting quotes:
I
don't think I fully bought into the concept of a single device until I
started using the HTC S640 smartphone. Now that I have my email,
calendar, contacts, phone, etc. available to me no matter where I am on
a single device, without having to remember to sync it when I get home,
or am in range of a wireless network, I can't believe I waited as long
as I did to make the switch!
There's lots more to read in the interview.