I have a solution of sorts for people who want to add Digg This! buttons and so on to their posts. It's not perfect, but it works.
Briefly I've created a bookmarklet. What you do is - before you publish - set a stub for your blog entry. Then click the bookmarklet and type in the stub. This will generate code just like Oddiophile's technorati tags bookmarklet. You copy the code and place it in the blog entry wherever you want it.