All about Microsoft posted a news story that Microsoft has began rolling out its Expression Studio 4 suite to existing Expression customers

The new tool suite does not support Windows Phone 7, which Microsoft is in the midst of evanglizing to developers. That support will be added to a future release of Expression, officials said, declining to provide a delivery timetable. Microsoft has been touting Expression Studio, alongside Silverlight and XNA, as its primary development tools/platforms for Windows Phone 7, the first new versions of which are due to ship this holiday season.

  Microsoft Expression 4 tools, minus WP7 support, start shipping