e-book is a great and novel idea but can everyone buy it using credit cards - I know some of my friends who used to buy tech mags using their saved pocket money and think of those who buy a mag occasionally. Many people still likes to read a magazine in paper format instead of reading it as a e-book on monitor.
Another thing can be done : publish only the mag - put a secret code behind it which can be used to download the fast track pdf from the website as a e-book.
So it would be great if digit guys can give their non-subscriber customers several options to choose from I mean mag as a online e-book, mag+ft only, regular issue with discs etc - thus it would be the best and most customer friendly mag in the world I believe