We just created an "Email Marketing Resources" page over at MailChimp.com. It’s a list of all our favorite blogs, websites, downloads, and resources. Some of the sites are classics (sites we bookmarked and visited religiously when we first got into email marketing). Some of the links go to best practices guides from anti-spammers and email authorities.
Hope you find it useful. If you’ve got a blog, website, or article you’d like listed, please let us know.