Digg.com is a fantastic resource, easily one of the best places to find tech info and see what sites other people find interesting.
However, as with all things it is wide open to abuse.
For example this page – along with its spam-like title – is one of the most dugg items on the programming strand at digg.com. (see http://digg.com/programming for more info).
However, this page is FAR from the best regex site ever. It is little but a blatant attempt to advertise the commercial software. Despite this, it has LOTS of comments and hundreds of diggs.
As previously mentioned (on this blog), the problem with sites like this is that it is very easy (and quick) for the sites it represents (the ones people post) to become very polarised. If you posted a new link to a programming site for example, only the die-hard diggers would find it – most casual users would be left looking at the “most popular” ones on the front page.
That said, it may not be ideal but Digg.com is good….