Which blogging software?

Among the free blogging sites, I recommend WordPress over Blogger.

Blogger gives you very simple capabilities: blog, post, tag, and archive posts and enable and manage comments. If you want something more complicated, you must go into your template and edit the code. There are no categories, so things tend to get chaotic. And if you customize your blog or change templates, all your improvements disappear.

Wordpress has more features that are useful for a larger blog. You don't have to use them until you need them but they are there. You can not only set tags but specify categories. You can set up a rotating blogroll instead of hand-coding it. There are simply a lot more options, which give you more flexibility.

Here's my test blog, created during a few minutes of the Blogging Skills session at the Science Blogging Conference.