This years ACM Sigcomm conference is held in Kyoto, Japan. There is a paper about BubbleStorm, a flexible P2P system for meta data distribution and lookup and also about the analysis of Skype traffic. The paper by Xie et al. addresses the dynamics of IP addresses. Oliveira et al. studied the evolution of AS topology. These were the most interesting papers to me.
Update (2008-02-24): some theory related papers presented at ACM Sigcomm’07 are reviewed here.
