Blogetery.com - Offers multiple templates, anti-spam, free sub-domain and more.

BlogRox.com - Runs on WordPress and offers 50MB of free online space.

Blogsome.com - Based out of Ireland, this site uses the WordPress MU platform, large choice of themes.

Edublogs.com - WordPress powered blogging for educators.

WordPress.com - Not only can you install WordPress on your own sites, you can use the same software on their site and save yourself all of the technical work.