This is now supported, however it’s tricky. See “My post content does not appear when I use a MailChimp template. What’s wrong?” on this page for details: http://www.faqme.com/autochimp and also: http://www.wandererllc.com/company/plugins/autochimp/campaigns-options/
This would be extremely helpful to us as well. Right now, without any branding, the automatic feature isn’t very good for us. We’ll have to explore RSS integration as an alternative until this can be worked out.
