Ian Betteridge links to an interesting idea: Digg is Usenet 2.0.

Digg will become more and more like an overcrowded Usenet board – the trolls will end up owning it.

As Ian says:

Anyone with a smattering of knowledge about the history of Usenet knows that “the wisdom of crowds” is an absurd idea. Individuals within crowds might be wise, but there’s no guarentee that their voice will be the one you hear emerge.