Those of you like me that have been starving for Data Entry type controls for Silverlight 1.1 Alpha will be happy to know, there is yet another option!
ComponentOne has released an Alpha version of their "Studio Enterprise Silverlight Toolset" (codename Sapphire) which appears to have some very compelling data entry controls including basic stuff like buttons and containers and even advanced stuff like TreeViews and a DataGrid!!
This is the stuff that C1 demo'ed at REMIX07 last month (loved their lab coats and dry humor by the way).
INFO AND CODE