October 8, 2009 — WordPress.com users can now insert detailed archives into the body of a post or page. This quick tutorial will show you how to add the archives shortcode, what the results will look like, and what options are available.

There’s also a Support page on this shortcode available here with more information.

August 3, 2009 — The Archives widget displays a month-by-month list in the sidebar of your blog that your readers can use to navigate your content. Find out more on our dedicated WordPress.com support page.