This paper critically inquires into social networking as a set of mechanisms and associated practices developed in a structured Web 2.0 language learning community. This type of community can be roughly described as learning spaces featuring (more or less) structured language learning resources displaying at least some notions of language learning methodology. Taking Livemocha as an example, and especially the Culture space, social networking will be analyzed in terms of the extent to which it is used and taken up by language learners by means of social networking technologies comparable to those of a Social Networking Site (SNS). In addition, we critically examine the role of social networking architectures in sustaining peer language learning in highly networked spaces. We argue that social networking, both as a conceptual framework and as a technical incarnation, can be put in the service of collective activity and instrumented in a way that leads to effective language learning, beyond merely being a trendy or fun component of an SNS-like community. [For the complete volume, see ED574893.]