No10's Twitter status worth $250,000?

By getting involved early and enthusiastically in the whole Twitter thing, has DowningStreet earned itself $250,000 of free digital engagement? Well-known internet entrepreneur Jason Calacanis (number of followers: 63,000) has offered Twitter a cool quarter of a million bucks - as I believe our American friends would describe it - to secure himself a two-year [...] read on »