You can see me (and others) pontificating about how brilliant World of Goo is in
this thread here.
Now, to celebrate the year anniversary of its release, 2dBoy are selling the game for a 'Pay what you think it's worth' fee. You can pay as little as 1 cent US (the minimum payment) or as much as a million - and you get a full, legal copy of the game.
If you haven't played it yet, now you have no excuse. This is one of the most imaginative, brilliant, fun games I've played in my life.
Go out and buy it now.
http://2dboy.com/games.php (Until Sunday the 25th of October).
Also, commentary on the Pay What You Want model is available from
2dBoy themselves and from
Rock, Paper, Shotgun. The results may surprise you.