I still have mine and use it daily, but as an iPod touch now. I got mine right after the September 2007 price drop, when the 4gig was being sold for $299 until they ran out. This was when the reaction was somewhere along the lines of "OMG!!!!! $299 for an iPhone, what a deal!" 😛
The only reason I don't use it as my main phone anymore is because it's only a 4gig. I bought my friend's old 16gig 3G (he got a 3GS because he likes to be on the bleeding edge), unlocked it, and am happily using my old iPhone plan on it - I can even use 3G!