The web is abound with reviews of the new iPhone 3G today, as I haven't purchased one I won't be writing another but I can provide a list of links.....
Edward Baig (USA Today)
Walt Mossberg (Wall Street Journal)
New York Times
Timesonline
Engadget Teardown
Engadget Q&A
Apple Store Lines
EDIT here is the Twitter iphone 3G noise from summize
EDIT More reviews
Stuff.tv
Daily Telegraph (UK)
CNET
I managed to resist the the first iPhone and purchased a Touch instead, however the addition of exchange did make me think about dumping my Blackberry, but the no Turn by Turn GPS, poor camera and no video will make me wait for the Blackberry Bold.
Still a great device but not for me.
\if you find any other reviews post the links in the comments below.

Rob, I don't know if you follow my blog or not, but I posted a detailed post about my attempted switch to the iPhone from my Blackberry:
http://iso-100.com/blog/post/why-i-tried-but-failed-to-switch-from-blackberry-to-iphone-3g/
Posted by: Ian Pitts | August 20, 2008 at 09:54 AM