How do I find archived content?

Just finished watching the MOZcon videos that was recently released (check download section or head over to seomoz and pull out your centurion card) and one thing got my attention.
This guy named Martin MacDonald that does SEO for big brands like McDonalds and PepsiCo was talking about how you could re-use content that has fallen out of index. He quickly talked about using Archived.org (waybackmachine) for this particular practice.

Now, my question is: How the hell do I do this? I tried generic keywords in the Search function over at Archived.org but I just get old video presentations and Voice media. What I am searching for is articles.

In a perfect world, this is how I would want to be able to work: Go to Archive.org, write in keyword "blue widget", search results shows me articles related to "blue widgets" that are a couple years old and are not indexed by G anymore.

Anyone that has had any luck with this? Share your thoughts!

Search= "bluewidgets+articles"

Have you tried this?

How does one search for expired web sites? Is there a way if you dont know the domain url?