Studies of public deliberation have thus far predominantly, although not exclusively, investigated deliberative processes in small-scale settings such as experiments and democratic innovations. One of the most pressing challenges for scholars is to bridge the gap between normative theories and empirical studies of deliberative democracy, answering the question of how processes of public deliberation can be given significance in large societies. The political blogosphere is of particular interest in light of this challenge, as it constitutes a medium for political communication that offers a low threshold for participation, low communication costs, and strong possibilities for mass communication in large networks. But to what extent can the political blogosphere transform its technological opportunity structure into a functional basis for wide spread public deliberation? This study has attempts to construct and employ a measurement of deliberative communication in order to evaluate the deliberative capacity of the Swedish political blogosphere. The measurement used is based on three criteria; 1) Occurrence of interactive communication, 2) Quality of deliberation, and 3) Inclusiveness of deliberation (N=204). The analyses show that a small minority of the blogs (N=19, 9,3%) satisfies all criteria in the measurement. These blogs hosts about a fifth (N=235, 21%) of the interactive communication between bloggers and blog readers in the sample (N=1118). On a whole the study can conclude that deliberative communication is sparse and isolated to a small number of blogs in the Swedish political blogosphere.