writes "With a combination of GPS, Wi-FI-positioning, compass, and accelerometers, the iPhone is turbocharged for location-based services. Combine this with the new 3.0 iPhone OS and interesting things are certainly going to happen. Steve Jobs said that the iPhone will change the world when he presented it back in 2007, and that is exactly what it will do."
The bulk of the article is about using the phone as a super real world pointer, which could be really cool if it could be accurate enough to be useful, although not particularly ergonomic. (Are you pointing the screen at something? The camera? The headphone jack?)