Blog-City - Feature-rich, easy-to-use service. Free to get started with a fee for premium services.

Blogger.com - One of the leaders in the blog-hosting business. You can create and launch a blog in just a few minutes.

BlogHarbor - For-fee site with lots of nice features.

BlogHI! - You gotta love someone who writes an "about" page like this: "blogHi! is operated by one man only, as a hobby and a service to the internet community. At about $2 a day incoming revenue, with far less profit; it's unfortunately not a profitable enterprise...By this time we guess nobody reads this page anymore, since we never got any donation..."

BlogIdentity - 1GB of storage space, domain name and e-mail address for $99/year.

Blogmaker - A free lifestyle weblog community of online journals & diet logs. Typos on the home page don't enhance its credibility.

Blogsource - Create a blog for free. Has statistics.

Blogstream - Blogging for Everybody. Has a related chat room.

Bubbler.net - Specializes in supporting multimedia content.

Frihost - You get a lot for your money (it's free) with this blog hosting service.

Instablogger - Sells Blog In a Box, a low-cost toolkit that helps novices get started.

LiveJournal - This is a user-supported, open-source service run by Six Apart that lets users create their own blogs for free or add advanced features for a fee.

MosaicGlobe - Free blog/website host for creative professionals. You can pay for advanced features.

SquareSpace - Industrial blog site with advanced editing, content management, structural control and syndication features. Oriented toward SMBs that want to do more than just post opinions.

Tagworld - Kind of a supercharged MySpace, Tagworld combines blogs, photos, videos and tagging into an environment that lets you create custom Web pages quickly and easily. 

Typepad.com - Another place to create a blog. Typepad has nice tools and template but you have to pay for it.

Wordpress - Not a site but an open-source tool for blog creation and one of the leaders in the category. This is good if you want to host your own blog.

Xanga - Has a lot of neat features for formatting and displaying photos. You get 200MB of image hosting and some nice authoring tools.

Duck Computing - Offers free wiki hosting. True, it's not a blogging site but wikis are an up-and-coming area of social media.

Wikispaces - Fast, free and easy creation of custom wikis. This is a great place to try out this community editor.