1.3m Irish on Facebook
THE number of Irish people registered on Facebook more than doubled in the past year to 1.3 million, latest figures show.
Twitter has also experienced huge growth, according to the research conducted for O2, growing from 97,000 monthly users to 173,000.
The research coincides with the launch of O2's new free social networking, the O2 Social Link.
This is a social networking application that allows users to view and update Facebook, My Space, Twitter and read RSS Feeds on their mobile phone on one screen, in real time.