According to GBATemp.net, some hackers got their hands on one of the demos for Legend of Zelda Skyward Sword. According to the website the demo is timed but hackers are working on trying to unlock the 2-3 hour playable demo, this is not the full version of the game since it’s only 900MB big.
"Additional info collected by our members: this version was apparently compiled on August 23, 2010. The game ID is DAXP01. There are six languages available: english, german, spanish, french, italian, dutch."