Silverlight for Symbian is now generally available. This brings the Silverlight experience to the, according to the team’s blog post, 20+ million users of Nokia S60 5th edition Nokia 5800 XPressMusic and Nokia N97 devices. The Beta release had 35K downloads and the team expects more with this RTM release.
You can get it from the Ovi Store.
If you’d like to develop Silverlight applications for Symbian devices, take a look at http://www.silverlight.net/getstarted/devices/symbian/