Apple posted their guided tour for the iPhone 3G a little while ago, but for those of us who don't understand English, Apple has posted a Japanese version of their iPhone 3G guided tour.

　　Probably isn't going to be all that important (although that brings into question what you're doing on an English-speaking website in the first place). That said, it's kinda fun, and they do a longer demo of the Chinese character recognition tool in the keyboard. You can check it out here.