Here are a collection of free marketing e-newsletters
I would highly recommend for internet marketers:

Site Pro News:
http://www.sitepronews.com/

A very good Newsletter for new SEO developments
and general web marketing news.

Web Pro News:
http://www.webpronews.com/

Another good general resource for SEO news
and related web marketing developments.

Web Marketing Today:
http://www.wilsonweb.com/wmt/

Published since November 1995, Web Marketing Today is
the largest circulation Internet marketing e-mail
newsletter in continuous publication.

Marketing Tips Newsletter
http://www.marketingtips.com/newsletters/

A good newsletter for promotional tips and tricks.

Here are some Free SEO forums:

http://searchenginewatch.com/

http://www.seo-guy.com/forum/