Twice as fast compared to previous EDGE connection. That was one of the bullet-points given by Jobs during the keynote.

Yes. With the addition of a GPS receiver inside the new iPhone 3G, you need as big a receiving surface not affected by interference to allow optimum GPS reception. Otherwise, Apple would have to use protruding form factor that would ruin the look of the iPhone.

On the contrary, I rather like EDGE speeds. They are constant and stable. My last encounter with 3G is with Celcom Mobile Broadband, and that is embarassing to see the 3G speeds barely crawl past EDGE.

Same. The catch here is you cant cache the map via Google Map, and have to rely on 3G connection to download the mapon areas you're driving. Without unlimited 3G plans, your bill would be astronomical.

The same specs as per previous model, with the inclusion of 3G and GPS chip, as well as a warmer temperature display screen. The previous EDGE iPhone screens are skewed towards colder temperature, meaning they are biased towards color blue. The new 3G model is biased towards yellow, and warmer colors, hence why you see the initial report saying that the screen having a yellowish tint.

Did I miss anything?

There were times when I get a whiff of clique-y-ness around these parts, but I didnt let it bother me. Just talk to everyone, kelvin, and if nobody else respond to you, I'll always be there to answer your queries.

Just dont ask things already answered here. That's where the stickied FAQ thread up there is for.

There's a video on Engadget showing how the GPS works. You cant do voice navigation on it, but it certainly tracks your whereabouts nicely. With the current Maps app that can already tell you directions to get to your destination, that should work nicely with the GPS onboard.

The only downside is the inability to store or cache the maps while you're on the move.