Congratulations to Miguel de Icaza and his team at Novell for the completion and release of Moonlight 1.0! Moonlight is an open source implementation of Silverlight for the Linux platform developed in a joint effort between Novell and Microsoft.
Silverlight was the primary deployment vehicle for live online video coverage of the Olympics last summer, and more recently live video coverage of the Obama inaugeration last month. Moonlight enables Linux users to view video and applications built for Silverlight on their Linux boxes.
Scott Guthrie has more details here.