It's interesting to see the evolution of social media sites like Twitter in terms of the airlines. A few have really embraced Twitter, while most still don't seem to be taking full advantage of its format. For quick snippets of info, relaying timely news on regular events such as delays, even airfare deals, the immediacy of Twitter works really well.
Even though it isn't as widely used as some other social media sites like Facebook, Twitter seems made for the airlines - updates of 140 characters or less for posting a public message. Quick and easy.
There is a lot to wade through in terms of Twitter, and not all airline pages that are up are actually officially affiliated with the airline. When I first joined Twitter, and as I continue on it, I find myself constantly going through new pages and old, trying to find ones that are consistently updated and solid for information. The result of my efforts is my own top 10 airline pages on Twitter...
Top 10 Airline Pages on Twitter - Social Media and Twittering Airlines
...and my Twitter page.

Nice Post. Twitter is good to make friends and promote your personal data.