After the revelation that something like 90% of the people who played Machinarium had pirated the game, Amanita Design has decided to have a "Pirate Amnesty" sale, where pirates can atone by buying the game for only $5 (normal price is $20). Whether you pirated the game, or if it's the first time you ever heard of it, I suggest you check it out. It's an excellent game, and well worth the $5. Buying it allows you to download versions for Windows, Macintosh and Linux, as well as the soundtrack for the game (in MP3 format). The sale ends August 12th.
If you've never heard of the game, check out the online demo and try it for yourself.
--Zero