If you are blogging with Google's Blogger, it's gonna be a delight for you. Blogger has added some cool new features like Embedded Comment Form, Star Rating, New Renovated Editor, Export/Import Blog Posts, etc. some which require plugins if you are using WP. These features are still being tested. But you can try them in www.draft.blogger.com, which has also gone through a huge makeover.
They ahave also come up with an API for the Comment Form and Star Rating features. Now, we are going to see some more creativity from blog hackers like Ramani.