Wikipedia
Tankafritt or Tankafritt.nu, which translates literally as download freely (.now), was started in Sweden in June 2006.
The program is an insurance firm for filesharing fines. For about $19 the Swedish filesharers are protected against the RIAA. According to the founder Magnus BrĂ¥th the company is working towards expanding beyond Sweden but there are still legal issues.
Their sales pitch is that if you're ever convicted of a criminal copyright infringement in a filesharing case, all you get is a T-shirt saying "I was convicted of filesharing, and all I got was this lousy T-shirt."
Tankafritt stopped accepting new members and renewals of the membership the 28th of November 2008. Not long after a number of new file sharing related insurances showed up in Sweden. Among them Tankalugnt.nu and Mediabot.se.