Much research into the use of online information and communication technologies for the internationalisation of learning and teaching has focused on established web technologies. This paper considers the possible internationalisation implications of existing uses of social software, also known as Web 2.0 technologies, which are now widely available inside and outside of formal education settings. The paper reports on two studies: the first, conducted at a large Australian university, investigated differences between international and domestic undergraduate students' (n = 1973) use of web-based technologies and tools; the second investigation reports on interviews with eight Australian and eight Singaporean university students about their use and perceptions of blogs and blogging. The findings from two studies provide new evidence of both cultural similarities and cultural differences in aspects of young university students' use of social software for communication and content creation. Discussion and conclusions draw out factors to be considered in planning to implement new uses of social software among culturally and linguistically diverse students of the Net Generation, in Australia and more generally. (Contains 2 tables and 1 figure.)