The Wall Street Journal's Walter Mossberg reports here [no sub req'd] on his pre-launch Apple Nano:
Overall, in my tests, the iPod nano performed as advertised, or better. I found no significant flaws or downsides. The only quirks are that the headphone jack is on the bottom, because there isn't room for it on the top; and to make room for the jack, the standard iPod connector port that hooks up to many accessories has been placed off-center. But neither of these oddities matters much. In fact, the bottom-mounted headphone jack makes the optional lanyard earbuds possible, and keeps the screen oriented properly when you're wearing them.
Despite its small size, the nano sounded as good as any other iPod, and is packed with plenty of audio power. Plugged into my car speakers, it was able to belt out the new Fountains of Wayne rocker, "Maureen," loudly enough to be heard perfectly, even though I was going 70 mph in a convertible with the top down.
