Apple's iPhone Dissected: We did it, so you don't have to @ AnandTech
 

*Source: AnandTech (http://anandtech.com/mac/showdoc.aspx?i=3026)*
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We have only had the phone for a few hours but we needed to get inside its casing, what follows is our dissection of the Apple iPhone. Please note that we're doing this so you are not tempted to on your recent $500/$600 expenditure, while it is quite possible to take apart using easy to find tools we'd recommend against it as it will undoubtedly void your warranty and will most likely mar up the beautiful gadget's exterior. Do whatever you wish to your iPhone, but do so at your own risk.

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