I would be all over this if there was a Kindle option. I don't like reading on LCD screens, especially when I have a gadget that is 100% dedicated to reading.
Yeah, it's odd considering Marco already produces very nice Kindle articles out of Instapaper, so he's familiar with the format. And Kindle supports subscriptions.
In The Magazine FAQ Marco says he's looking at the options for Kindle. I'd be surprised if there's not a plan towards having it given Marco seems to be a very big fan of the e-ink Kindles.