Do you think blogs will someday replace other forms of media?

I don't think so. Because most the media can give everyone the firsthand reporting.
So we can't use blog to be our media, but we can use blog to discuss the events.
And we can get other people's view and ideal.

Do you have a blog ?

Yes ,I have .
I use it to study English and understanding more new friends.
Now, my friends all have their own blog, and we visit every classmates blog mutually . we also made a lot of net friends by blog.