a year back when Microsoft started silverlight i was not sure about it’s future and with the pace they were proceeding. But in this short span Microsoft has taken some serious steps towards the development and interoperability of silverlight. Like for Linux platform a collaborative effort Moonlight (though i haven’t tested but it looks promising) is open source cross platform implementation of silverlight.
also news are around that Microsoft is testing beta for Silverlight for Android.
and just days ago they launched Silverlight for Symbian, such steps showed Microsoft’s strong efforts to strongly capture the Market which is currently owned by Adobe Flash.