It is very similar to the likes of reddit and slashdot, except now the creators are trying to make it into a social networking place as well (similar to facebook with news/submitted things).
Created by Kevin Rose, it is ran by its users through their own content driven submissions. The digg community voice consists of atheists and their leader, Richard Dawkins, Apple fanboys, pro-pot, Ron Paul fanboys, and/or all sorts of liberal hipsters.
"Ron Paul loves Apple's new product that resembles a pot leaf: cites and quotes famous atheist, Richard Dawkin, in the process."
and you'll get thousands of digg users to digg it.
While the Digg concept and interface is great, the website is unfortunately hampered by many flaws.
The front page is nearly controlled by power users and it's nearly impossible for average diggers to get their submission into the front page.
As Digg becomes more mainstream, the core intelligence of Digg is taking a nosedive with the website slowly becoming a variation of 4chan.