BlogThis! button lets you blog any web content on the internet

Add a BlogThis! button to the browser toolbar, which lets you post to your Blogger blog from any webpage with just one click.Once you add the BlogThis! button to your browser toolbar, blogging will be a snap (or rather, a click). Click the button to open Blogger in a new application window. The new post is pre-populated with a link to the web page you're on, as well as any text you've highlighted on that page. Edit the post to your liking and post it instantly to your blog!

You can find Blog This! at the Google Chrome Extensions Store ("Store" doesn't mean you actually pay for it).