Ok, hope I'm not slow in bringing this good news.
But they just started for Japan and slowly other regions.
Welcome to Home™ Beta.
Home™ is a real-time 3D, networked community that serves as a meeting place for PLAYSTATION®3 (PS3™) users from around the world, where they can interact, communicate, join online games, shop, share content and even build their own personal spaces. Home™ will be available as a free download from the PLAYSTATION®Store and will launch directly from the PS3™ system's Home Menu.
Keep checking back on this site to register an interest in taking part in an exclusive closed Beta Trial of Home™
More:
http://kalel7.blogspot.com/2008/08/ps3-home-beta-trial-announced-accepting.html
http://www.engadget.com/2007/04/25/sony-now-signing-up-playstation-home-beta-testers/
http://gizmodo.com/5031383/sony-shows-latest-ps3-home-now-recruiting-beta-testers