The lack of any mention of a vibrator is a good point. Maybe Apple flat ran out of room for one! A good chunk of the housing's volume is going to be taken up by the battery and the display/touchscreen, and the phone isn't any bigger than a Blackjack or Q to begin with. It's possible they snuck in a multifunction transducer instead of a standard speaker, which would function as a vibrator or "rumble-pack" at low (~180Hz) frequencies. Last ones I saw were still a bit on the big side, though: not sure one would fit.I haven't seen the vibrator or GPS from any relaible source. Even in the keynote there's nothing indicating it knows where you are, Moscone Center was bookmarked and appeared as much as the "current" location as did the Eiffel Tower. I highly doubt there's GPS in the iPhone, that would be mentioned somewhere. Location over cell networks works in some areas, but iit's not really precise or reliable.
Regarding GPS: the FCC basically now requires all cell phones sold to have some sort of location determination ability for emergency purposes. Since this phone is GSM, either it has a dedicated GPS receiver chip and antenna (the antenna's the tricky part, since it needs to have a good view of the sky, and the housing doesn't provide much in the way of clues) or relies on cell base station triangulation. Throw in the various maps of WiFi hotspots that can also be used for rough determination of position, and the phone certainly has some way of pinning down its position for Google Maps.