Sweden currently has 'Antipiratbyrån' that tracks IP's to users.
http://translate.google.no/translate?hl=no&sl=sv&tl=en&u=http%3A%2F%2Fwww.antipiratbyran.se%2F
Several users have been found guilty.
http://torrentfreak.com/guilty-verdict-in-record-breaking-swedish-file-sharing-case-111101/
http://www.thelocal.se/38074/20111221/
+ pirate bay issue and a few others.

In Denmark they have some of the toughest laws when it comes to tracking users and punishment of these 3 countries. Heavy DNS blocking abuse.
http://torrentfreak.com/biased-anti-piracy-laws-cause-problems-in-denmark-090410/
http://torrentfreak.com/danish-pirate-bay-isp-block-gets-supreme-court-date-100317/
http://torrentfreak.com/anti-piracy-group-asks-court-to-order-grooveshark-dns-block-111114/
Denmark also lets the copywrong lobby access the person registered to an IP:
http://torrentfreak.com/ifpi-wins-danish-file-sharing-case-081021/
http://www.techdirt.com/articles/20110328/00515413645/danish-supreme-court-sets-high-bar-evidence-file-sharing-cases.shtml
There are more.

In Norway, so far only 1 convicion, and that was for a Norwegian film, Max Manus. http://translate.google.no/translate?hl=no&sl=no&tl=en&u=http%3A%2F%2Fsimnews.no%2Fimmaterielle_rettigheter%2Fmax-manus-saken-et-gjennombrudd-i-kampen-mot-rettighetsbrudd-pa-nettet%2F2010%2F
They later got their access to look up the people behind an IP revoked. I currently do not know of any other case, and private interests are NOT allowed to look up the person behind an IP, and police will not do it either.
There is currently a suggestion to change the laws suggested to allow private investigators to look this up, and further criminalize pirating. We're fighting it. (Same shit as SOPA/PIPA basically). DNS blocking exists, but not abused as far as I know.

As you can see, the Norwegians so far have the least oppressive and aggressive laws when it comes to how to chase/identify and chase people in court. And yet, we are having the largest increase in people willing to pay for products.