Well howdy there
It'll really only be a dreamsign if it shows up in your dreams frequently enough to be a reliable sign that you're dreaming. Sometimes electronics can work, too. So really, if your goal is to DILD by using dreamsigns, you want to start recording every dream you can remember and see what is consistent about them so that you can begin to find out what your RCs are. If the ipod is showing up in your dreams, go for it!