Very true. Posterous executed amazingly. They addressed a large market with early adopters who were already primed by email-blog gateways & xmlrpc clients, and

Very true. Posterous executed amazingly. They addressed a large market with early adopters who were already primed by email-blog gateways & xmlrpc clients, and they had a great, repeatable message that was embedded in the email address: "oh you want to start a blog? just send your first post to post@posterous.com"