Full Screen Mail.app with other windows in other Desktops - Lion I use Mail.app in full screen mode quite frequently.  However, I often like to open up and individual message for a task I'm working on and move it to a different Desktop.  Opening up a message in full screen mode does nothing more than bring up a overlay showing the message but doesn't open another window that I can move elsewhere.  

Is there a way to get individual messages in different windows to move to other Desktops when using Mail.app in full screen?
When I need to open a message in other desktop I quit full screen mode, open the message(s) and then fullscreen again: just the main Mail window goes to fullscreen, leaving the messages windows open in the desktop where they were open.