David,
About the spam-or-ham point you raised - as mentioned in my previous post, I realize that it's technically not spam because of the opt-in nature of a safelist. Would using the word 'Mass Commercial Mail' instead of the word spam express it better?
Anyway, it is still my opinion that (despite the opt-in), safelists are still something that generates large amounts of traffic for the servers with relatively low returns on investment.
You're right about FM's position on SafeLists...
http://www.fastmail.fm/docs/faqparts...SignupSafelist
However, many safelists (at least the first page or so of them I found on a google search) have put Fastmail on their 'Do not sign up with addresses from these providers'-list...
--K
--K