Tech-savvy President-Elect Barack Obama is to use YouTube as one platform to broadcast his "weekly address" to the American people, starting this week.

Obama used the video-sharing site as a tool during his election campaign, in addition to launching an iPhone application.

Here in the UK, prime minister Gordon Brown offers an "Ask the PM" YouTube forum, while the Queen has her own channel and broadcast her Christmas Day speech on the Google-owned site last year.