I live in Australia, so I've never liked Amazon, mostly because of shipping prices, and I don't have an eReader and don't generally download eBooks. But their hugeness in the market unnerves me.

I like the idea for Summerlight! You could go to very interesting places with it. It's great that you know which direction you want to take. Run after it. =)

The purpose thing - an interesting thought. Will have to think more about it, myself...