1) Will the digital version be DRM-free? Even if you're not opposed to the concept of DRM, I'm sure you understand the logistical issues around consuming DRM crippled content on Linux.
2) You say you "aim to use an open source/Creative Commons licence." How firmly are you committed to this? I really like the ideal of content going free after 9 months.
3) What percentage of pages do you anticipate will include advertisements/sponsorship? It seems most magazines in our industry are cramming in as many adverts as possible, and worse - disguising them as real content (yes, I'm looking directly at you, Wired/Conde Naste). It's bad enough feeling like "the product" in the context of the unrelenting waves of ad-sponsored and metric-selling web-apps, it's a lot worse when you're paying for the privilege (via subscriptions to magazines with more ads than articles).