During the GDC08 (Game Developer Conference) Microsoft announced the availability of Xbox LIVE Community Games, which is games that is developed and published by the community (meaning you and me). Turn on your Xbox 360 and do the following steps to play your favorite Dream Build Play contents games like Little Gamers and Dishwasher.

Either follow this short version, or click the link below to read a longer explanation on how to download these games:

1. Marketplace -> Game Store -> All Games -> XNA Creators Club Game Launcher
2. Games Blade -> Games Library -> My Games -> XNA Creators Club -> Press the Yellow Y button!

(it's very hard to notice that you can actually press the Y button to start downloading XNA games on Xbox Live, but please enjoy yourself with free XNA games on your big screen TV or projector)

Long description: http://www.xbox.com/en-US/community/events/gdc2008/xna/howtoxna.htm

Announcement on the XNA blog: http://blogs.msdn.com/xna/archive/2008/02/20/announcing-xbox-live-community-games.aspx