Denise Cox has a list of 10 things your signup page should have over on her blog.
The AOL postmaster blog has its first post up talking about bounces.
BeRelevant has a great blog with lots of suggestions email best practices.
Mark Brownlow had a great post this weekon moving the unsubscribe button to the top of your newsletter to make it easy for customers to unsubscribe. The comments are a must read as well, including one commenter that saw the number of ‘this is spam’ hits go down when he moved the unsubscribe link to the top of the email.