Free CMS for hierarchical site

For a presentation site, I would like a free CMS having the following features:

High priority

• hierarchical site - each page/post is in a specific section (this must also reflect in the friendly URL - EG I don't want the link to be /2010/05/20/title-of-post, but /section-a/title)

• tags

• breadcrumbs

• integration with Google Maps (simple functionality, only to show some places on the map)

• integration with Google ads

• SEO friendly

Low priority

• full text search

• integration with Facebook Connect

• rich text editor for posts

• automatic sitemap generation

• votes, comments, etc

I do not have a technology limitation.

Could you please give me your top 3 choices?

From web app Vlad Zloteanu

• The Open source CMS, Plone and it's add-on products will do everything on your list. It runs on Linux, Windows or OS X.

  I've used it for many years and would recommend it highly.

  Organizations as diverse as NASA, Oxfam, Amnesty International, Nokia, eBay, Novell, the State Universities of Pennsylvania and Utah, as well as the Brazilian and New Zealand governments — all use Plone. - Via plone.org/about

  From Jon Hadley

• I like WordPress.

  You can customize its URLs for news items to not include dates, but instead use (nested) categories.

  Or you can use posts, which can be nested too. I find the URLs for nested pages just a little less intuitive, but can't really even explain why. Maybe it is slashes at the end (e.g. /parent/child/).

  The rest of the options are available via plugins or you can theme it.

  The good news with WordPress is that it gives you archive and categories and other navigational collections for free. The bad news is that it only does that for blog posts/news. So, if you have multiple news streams, you will not be able to just do that.

  Also, the WordPress pages interface (out of the box) is not that good with very large sites. But I believe there are plugins for better interface.

  And WordPress 3 has been adding features to directly compete with other bigger CMSs too.

  tomjedrz : Here is a site of a WP theme designed to "amplify" the CMS features. http://wordpresscms.ithemes.com/

  tomjedrz : FYI .. There is a StackExchange site for WordPress that just hit private beta. It should hit public beta on 19-Aug or so. http://wordpress.stackexchange.com/

  Alexandre Rafalovitch : I'll be there. I am currently building a corporate theme/WCM with WordPress....
  From Alexandre Rafalovitch