So finally it has been released. SCOM 2007 R2 where one of new big features is monitoring Unix/Linux computers (which happens to be what I'm been working on for the last two years). There is an evaluation copy available here. More community resources available here, here and here.
General availability is July 1st 2009 (i.e. when everybody can get this). Right now only existing customers with the correct upgrade agreements can download this release as far as I understand.