Pretty good write up for beginners. I think you should add a link to http://arduino.cc/en/Tutorial/HomePage in the Whats Next so people can see what else they can do with the Arduino!
Congrats.
What you said prompted me to think of a tweet I saw from smashing magazine:
"It’s good to share what we know. You needn’t be the first, you’ll just help if you’re the first that somebody finds." https://twitter.com/smashingmag/status/278041226622668800
Whilst it's not exactly what you said I think the sentiment is the same...