Blogger
By Google, so one of the most popular sites. I find it a bit narrow and annoying for people to add comments.

Blogsource
Very simple blog host that doesn't allow a lot of extra features compared to other hosts.

Bravenet
Free web host with good blog page. Ads are a bit annoying (can be removed for a small fee).

Diaryland
Free blog host that allows you to create and personalise your 'diary'. Very animated compared to others and can be a bit of fun.

Easyjournal
Easy, simple blog host. Signing up is quite thorough, but once done, there are templates to choose from to help create your page.

eBloggy
This blog host is nothing special, and at times the pages can look very scattered and un-professional. However it has an easy sign up process, and is simple to create/manage your page.

Facebook
Like Myspace this can be described as a networking host. Once again it is free and is more interactive that Myspace allowing users to contact their 'friends' in various different ways other than just writing to them on their 'wall' (page).

Google Pages
Like most software created by google this offers the user quite a large amount of space to use. Is more of a webpage, but can be used as a blog, as well as having multiple pages that you can add. Easy to use, however they now require that you have a Gmail account in order to get you own page.

Multiply
Great site to express your interests, host photos and videos. The pages look classy and are set out very well.

Myspace
Although this can be better described as a networking host it allows users to create a database of friends, leaving posts, pictures, invitations, videos etc on each other's sites. It is free, but the blog section can often be overloaded with spam.