Although most of us believe that digg traffic is junk traffic which just eats up the bandwidth and is poor in converting, but still no doubt that digg is traffic generating monster. Found this very interesting post on SEOmoz blog about getting traffic from digg comments. http://www.seomoz.org/blog/guide-to-traffic-from-digg-comments Worth reading.
Nice read. Thanks for sharing. Gives some really useful tips. Digg Comments can surely be a Goldmine for driving traffic.
Putting your link anywhere will bring traffic! I know I have clicked a few URL'S in digg comments myself...
But also at the same time it will increase digg comments spamming. But as said in that article, digg members community is very fast in burying the spammy comments.
Posting links anywhere always brings in some traffic. It never hit me to do it on digg though. Good share.