I have subscribed to "Stereophile" through Zinio, an iPad app (and web magazine service). I love it (I still have the actual magazine coming to the house, for now, as my subscription hasn't run out yet). I also subscribed to "The Absolute Audiophile", an international, e-magazine only rag that I have enjoyed as well. Check them out at Zinio.com to see if you have an interest.
John
John