A reminder what these were about:
The Hadoop Summit brought together leaders from the Hadoop developer and user communities for the first time. Apache Hadoop, an open-source distributed computing project of the Apache Software Foundation, is a distributed file system and parallel execution environment that enables its users to process massive amounts of data.
Hosted by Yahoo! and the CCC, the Data-Intensive Computing Symposium brought together experts in system design, programming, parallel algorithms, data management, scientific applications, and information-based applications to better understand existing capabilities in the development and application of large-scale computing systems, and to explore future opportunities.