One of the iPhone 4's most heralded new features is FaceTime video calling. For the time being, however, this only works for calls from one iPhone 4 to another, so if you don't know anybody with an iPhone 4, you can't really test it. Thankfully, though, Apple just set up a phone number for you to call: 1-888-FACETIME (1-888-32238463). A friendly Apple representative will answer your call, initiate a video chat with you and explain all of FaceTime's features to you.
We just tried this out and an Apple representative answered our call within seconds. After asking us if we were on a Wifi network (sadly, FaceTime doesn't work over the cellular network yet), the customer service agent transferred our call to FaceTime and explained all of FaceTime's features to us. The video and voice quality during our chat was very high.
Here are a few things we learned during our call:
For more details about the iPhone 4, also see: iPhone 4: Your Burning Questions Answered.
Tip of the hat to iSmashPhone for alerting us to this.