Already, I use Blogger for blogging. If I post a link to my blog on Twitter, I would like the image of my blog to show. If I post links to my blog post, I would like to have images to show and a few lines to that post. My comments would be from those following me on Twitter in my mentions tab.
I also see Twitter adding a blog tab. We could blog short post. The post could be a short paragraph. The paragraphs could be 10 lines long. People could Tweet comments under your post. The comments could continue to be a certain amount of words.
At WordPress, you can blog your post into the style of Twitter. You can see an example here at http://nobles123.wordpress.com/