Extensions for Google Chrome now available, presently you need to use beta version of Google Chrome to add them. Chrome extension BlogThis, makes it possible to post to blogger blog with a single click from toolbar in Google Chrome.
BlogThis- Google Chrome Extension
Any user using beta version of Chrome can now visit Blogthis extension page . After installing BlogThis, a button with blogger icon will be added to Google Chrome Toolbar. If you like an article on website and you can blog that post by clicking BlogThis button, which opens the new post with a link to that webpage as well as text you have highlighted on that page, you can edit and publish post to blogger.