The Dutch PlayStation website PSFocus.nl went to Guerrilla Games yesterday for yet another interview with the developers. This interview will come online later this week, but during the interview they gained information about the Killzone 2 Home space and Home integration.
At the moment Guerrilla Games is hard at work with additional content for Killzone 2. There not just working on patches and the upcoming DLC, but also on full Home integration.
They are going to add everything that Home supports. This includes at least a KZ2 Home Space and gamelaunching. The rest of the information is still classified, but there is some more information in the news item on the site.