1) Slalom is coming to Virtual Console in the next few months.
2) Is Microsoft working on their own version of Home?
They were...six years ago. Back in 2002, there was a small team inside Microsoft working on an "application" called LiveUniverse for the Xbox, which was more or less Home, it was slated for release around the launch of Xbox Live, but the project got canceled when work on Xbox Live fell behind.
3) Yes, Onimusha 5 is coming out next year for PS360. So are Dead Rising 2 and Lost Planet 2.