The spectacular development of the internet in the past two decades and enormous prospects for its continuing growth are transforming social life. Such unprecedented transformation is affecting not only forms of communication that have always been public, but also those typically more covert, such as interactions in hidden and stigmatised communities. These changes are very relevant to some sexualities, including men who have sex with men (MSM), for whom the internet is increasingly becoming a not only a way to arrange sexual interactions but also the fabric of a community not restricted by geographical boundaries...