Thanks for the feedback and for sharing your personal experiences. I think your comment about value being created in other ways (and in sometimes incredibly simple, non-techy ways) is something important to not lose sight of. Also, just in that example alone, future enhancement of a service like that could be automating the newsletter into multiple formats, for viewing on the go (such as a kindle format, PDF, etc.), instead of leaving it email only.

But yea, like I said in my OP, I don't even have a business idea yet. Whatever it is, it will need to have a real value prop to be worth doing.