well .... with the new information from MaryJo
http://www.zdnet.com/blog/microsoft/more-on-microsoft-jupiter-and-what-it-means-for-windows-8/8373
it now sounds more like a native code Silverlight, or desktop port of Silverlight for Windows Embedded, or an merge of SL4WE into the latest trunk version kind of thing...... hmmmm........ hope we can hear more in MIX or PDC, if there is a PDC 
Some video about SL for WEC7 are posted days ago:
http://www.microsoft.com/showcase/en/us/details/96127fbb-651e-41e3-bc93-acf3698b71c3
http://www.microsoft.com/showcase/en/us/details/72666c3b-07d1-4d99-839f-b346ef8d7d9f
http://www.microsoft.com/windowsembedded/en-us/products/windowsce/silverlightforwe.mspx
http://msdn.microsoft.com/en-us/library/ee502198.aspx
http://blogs.msdn.com/b/silverlightforwindowsembedded/
