Have you visited Amitabh Bachchan's Blog?
Amitabh Bachachan has a blog and he is doing some posts and answering the comments. I was just going through the blog at BigAdda, he has done some posts during April 2008 and its just getting popular. Tons of comments are coming up on his posts and comments are moderated before publishing. I hope he continues to spend his valuable time blogging.
He has posted some interviews and response to some articles printed in the Outlook Magazines. His posts are quiet long and I am sure somebody is helping him typing such big posts.