It was bound to happen; the folks over at iFixit have gone ahead and taken apart the iPhone 3G that they waited so long in line for in the cold wintry air of New Zealand.
They took apart the iPhone 3G piece by piece, layer by layer, right down to the logic board, and you can take a look at all the gory details over on their site. One of the more interesting things they discovered is that unlike that of the original iPhone, the battery in the iPhone 3G is not soldered on to the logic board, which means it's theoretically replaceable if you have the cojones to go through the dismantling process.
Discuss: iPhone 3G innards revealed; battery not soldered...