Apple has a 20 minute guided tour up. I'm not sure if you want to watch it all, but I did. And the greatest question of all has been answered. Rukas, you will be happy to hear that you can use both hands for the keyboard. The guy in the video is shown typing with first, his index finger and then showing how 'more advanced' users can use their two thumbs. He was breezing as fast as any other qwerty keyboard.
http://www.apple.com/iphone/usingiphone/guidedtour.html
http://www.apple.com/iphone/usingiphone/guidedtour.html

