Unlimited plans for Internet over wire is the norm in most European countries. The only exception I know of is the UK. And at least in Sweden it has been like this since broadband was introduced.
Ok, could be confusing you with Canada then. There I know for sure most connections have a monthly bandwidth limit.
I'm on FTTC in the UK (BT Infinity) and on the £26 a month plan it's unlimited (as in, really unlimited). They do throttle BitTorrent though, but that's no great loss for me.
I can confirm that for Poland; I've been using an unlimited cable Internet here for like, 8 years or so.