Hi! not sure if anybody from the Giraph community submitted any talks to Hadoop Summit, but here's the one I submitted: https://hadoopsummit.uservoice.com/forums/242790-committer-track/suggestions/5568061-apache-giraph-start-analyzing-graph-relationships
Feel free to upvote if you feel like Giraph deserves to be well represented at Hadoop Summit. Thanks, Roman.