Blog ^ 2

So I'm reading all of these blogs and comments, people opinions on random things and things about their lives. Wouldn't it be cool if Blogs weren't only text, like if there were video blogs, audio or stuff like that. I find an audio comment would be more appropriate sometimes as apposed to a smiley face or thumbs down emoticon. It would be cool if you could record your blog and then play it back with highlighted sub-titles, sometimes the way someone says something is way more important than what is said. Maybe after a string of 4 or 5 audio comments appear you can listen to them in succession like some put together conversation, or like some meeting that changes the camera focus on who is talking with video.

Does something like this exist already??