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GitHub User: joevandyk
resque needs redis running all the time. that's the daemon in question. queue_classic only needs the database.
premailer can generate plain-text emails.
We just went through the painful process of sending fancy html emails on Rails 3.1 a month ago. The CSS in our emails even have media queries so they look right on mobile devices. We used premailer-rails3, but it needed a lot of patching before it worked properly.
Our post about it is here: http://joevandyk.com/post/12980661035/fancy-html-emails-with-rails-3-1