Script Summary: Automatic cardlinks for Wizards' Magic: the Gathering forum
When you view a thread on the community.wizards.com forum, any word or string of words that matches the name of a Magic: the Gathering card will automatically be hyperlinked to the card's Gatherer page.
If you want to make actual card links in post you write, check out my autocard bookmarklet at http://haese.homeip.net/~carsten/autocard.html
Updated September 25th, 2009: Added Zendikar card list.
Updated November 12th, 2009: Since Wizards' "double-space fix" the post body appears directly in a div-tag rather than in paragraphs, so we'll have to operate on div-tags, too.