In my 'spare' time I'm developing a WPF pure MVVM platform composer, at the moment I have learned and improved many things like datatemplates nesting to create itemscontrols inside itemscontrols.
The idea is to create XMLs for XNA WP7 levels games. The first game I'll do is a shoot'em up with a new kind of levels, mixing different missions with achievements.
Note: The enemies are a really old version.
Great indie games are coming :).