Here is an interesting article: http://www.elistmania.com/juice/10_things_that_make_digg_special_for_internet_marketers/ Thanks.
All of my friends have Adblock installed, including me, as the ads there are annoying and irrelevant most of the time. In terms of traffic flow...it is sort of like pump & dump
Partner, the traffic from digg is like amazing. I recently got 80k+ in a period of 3 days. I agree the influx of traffic subsides with passage of time but still its worth the effort you put in. Just add quality content to your website and submit it to digg. You will get huge influx of traffic if the community likes your content.
Its not only the traffic but your social presence also gets boosted up with networks like digg. Not to mention the surplus of worthy links one gets on hitting the front page.