We have two papers accepted to OSDI 2012!
One on GraphLab:
PowerGraph: Distributed Graph-Parallel Computation on Natural Graphs. Joseph Gonzalez, Yucheng Low, Haijie Gu, Danny Bickson and Carlos Guestrin. [pdf][bib/abs]
And another on GraphChi:
GraphChi: Large-Scale Graph Computation on Just a PC. Aapo Kyrola, Guy Blelloch, and Carlos Guestrin. [pdf] [bib]