Added "Create New Page" and "Upload New File" to the navbar for 4.0.10. It is not possible to add "New Blog Entry" currently since a user can have many blogs, and there is no existing picker tool feature that works within the editor.
A user can create a new blog by "Create New Page" and then use the Promote tab after posting it, or the user can use the "My Feeds" link to go to the appropriate blog and use the "New Entry" link there.