The LittleBigPlanet demo (917MB in size) has gone live today in most PlayStation Network stores.
Currently it's reported as being available in the Japanese, Hong Kong and European PSN Store with North America (hopefully) coming soon as well.
To quote from GamersDigest.net (linked above): "We can confirm that the LittleBigPlanet demo is now available to download on the Japanese PSN store.
The demo comes in at 917MB, and features a small selection of levels from the game and community database, along with a few level creation tools to test out.
It will be released on other regional stores on the PlayStation Network later today."
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