We just announced our 2nd Large Scale Recommender System Workshop (LSRS 2014), to take place jointly with RecSys 2014. The workshop organizing committee is Tao Ye from Pandra, Qiang Yan from Taobao and your humble servant.
Last year, our workshop attracted the largest audience in RecSys.
Anyway who is working on large scale recommender systems is encouraged to submit an abstract or slides which describe their work. Submission date is July 21, 2014.