Email/blog Solution?, Turn newsletters into blog posts or vice versa

Does anyone know of a free or low-cost solution that combines email marketing and blogging? I'm helping a friend of mine on a new website. She's a naturopath who sends out a newsletter to her patients and others once a month. With her current site, she writes her newsletter using Constant Contact and then I would take it and reformat it into a web page for the site archive.

That seems like double work. What I want to find is:

1) a system where she can write a blog post instead of a newsletter, and then have the post go out to her email list

or

2) she can write the newsletter and send it out, and then click a button and post it on her blog.

She's adept enough to use an email marketing or blog interface, and I want to help her be able to do the whole thing herself.

Thanks!