Apologies if this has been discussed before.
I am a devout user of the Gramophone Music Guide for all my classical music purchases.
I think the Guide can be a great iPhone app with all the advantages of being digital (in-depth search options, cross-references, a much bigger database and even direct links to the iTunes music store!).
I would gladly pay a premium price for a well-executed app and would also be willing to pay incremental charges for yearly updates while I can't justify buying a new edition of the print version and get by with my '06 edition.
I highly value the content created by the experienced editors of this magazine over the years and I would be the first in line to support their value presented in such a convenient and accessible way.