Right-click on that interesting image and boom, you get a new post with the image already included.
Highlight some text and it automatically quotes it for you, properly references the original material, and you get a post.
This should work much like the "Share with Comment" in Google Reader.
In fact, maybe this should be something for Google Reader. Why not make it easier for me to blog about what I'm reading within GReader? It's like "Share with Comment" on steroids, it'd blog it and share it.