I found this fascinating quote today:

Twitter has a huge aviation community – from airlines and airports, to cabin crew and aviation enthusiasts. Whether you like to fly a plane or just watch planes fly, there are lots of aviation geeks on Twitter with whom you can converse about your passions or just listen.Shashank Nigam, High Flying Tweets: 11 of the best airline or aviation bloggers / journalists to follow on Twitter, Aug 2009

You should read the whole article.