Something More Than a Machine gets a little more social
Blog Posts (not ReBlogs) will now have additional links at the bottom of the permalink page to do nifty stuff like email the post to someone else, add it to digg or delicious and check Sphere for related posts.
The links will only appear on the archived permalinks, and not on the main page.
UPDATE: Actually, this feature is being implemented via Feedburner's FeedFlare suite, which doesn't seem to work consistently. So, depending on how everything is working on their end you may or may not see it on any given blog post.