i like the cnet asia's review, it's very in-depth and fair. But of course many of the user opinions are complete BS from kids who hate the ipods and haven't even gotten the M yet. They're saying stuff like:
"Pros: everything
Cons: nothing
Opinion:
simply the best..."
Haha. Anywhoo, the new pics of the Vision:M are pretty cool, but you can tell they "borrowed" some ideas with the dock and the design of the box.
If Creative can convince kids that this isn't a ripoff of the ipod, then they stand to make some decent money, since this thing seems to be quite marketable.
Register-
http://www.theregister.co.uk/2005/12/08/preview_zen_vision-m/
Mp3Gen(Translated French)-
http://www.dapreview.net/comment.php?comment.news.2707
Clubic.com(Translated French)-
http://216.239.39.104/translate_c?hl=en&u=http://www.clubic.com/article-30174-1-le-duel-de-fin-d-annee-ipod-5g-zen-vision-m.html
impress.com(Translated to English,Japan)-
http://translate.google.com/translate?u=http%3A%2F%2Fwww.watch.impress.co.jp%2Fav%2Fdocs%2F20051216%2Fdev140.htm&langpair=ja%7Cen&hl=en&ie=UTF-8&oe=UTF-8&prev=%2Flanguage_tools
Cnet Asia(English)-
http://asia.cnet.com/reviews/portable_av/0,39033456,39097200p,00.htm
They have all been currently very good. Most consider it on par with ipod G5 or better.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic