Sony Computer Entertainment Japan is sending word that they will be at their region's Online Game & Community Service Conference (OGC 2008) next week, March 14.

To be present at the event grounds is SCEJ senior producer Riyouzi (possibly Ryoji) Akagawa, who is expected to demonstrate the upcoming Home service for the PlayStation 3.
  
The announcement we're reading this news from indicates that this presentation is will unveil Home's features, although it did not indicate exactly what would be shown. Here's a Google translation of the lecture description taken from the official OGC site:

finally reveal the whole picture is a community service, "Home." In Japan, in what form and how services will be provided? Home actually watching the story of our innovation