Blogs for busy people

I was thinking how it would be great if busy people like Sir Tim Berners-Lee or the Queen could blog in some way. Here's the idea: someone like TBL would be able to 'call' their blog on the phone -- there would be a number they could call to contact their blog. The blog (by some arrangement) would record their message on the blog (in some format) and visitors would be able to listen to the messages. Also, the blog could employ a volunteer who could type-up the recorded message on a daily basis.

Any thoughts?

ideas