Greetings! For ethical reasons, it is important for bloggers to cite their primary sources. Accordingly, I would love to see a plugin that inserts a custom field for: source link (auto-resolves to article title), source name, and article submitter (if applicable).
The Consumerist uses a similar method. Here's a picture:
And here's the article: http://consumerist.com/2011/10/93000-psn-accounts-suspended-after-latest-attack.html.
Thank you for considering this request. :)