Hawkwings rocks. It's a blog about using Mail.app to its fullest potential as a lifetool, not just a mail client. Therefore, the writer branches out into related territory: iCal, AddressBook, and note-taking. For example for the latter:

[URL="http://www.hawkwings.net/2006/07/12/getting-organised-four-note-managers-reviewed/"]Getting Organized: Four Note Managers Reviewed[/url]

And then there's his expansive and ever-maintained list of Mail.app, etc. addons. He specializes in freeware, to boot: http://www.hawkwings.net/plugins.htm

He also offers his feed by either traditional newsreader RSS (MailTags[/URL] and all the other goodies he susses out to organize his articles and tips ([URL="http://www.kbcafe.com/rmail/bm.aspx?rss=feed:http://www.timgaden.com/hawkwings/feed/">direct link to input a desired email address for his Rmail feed).

I'm in geek.blog.love. :o