Simon Ritter starts with a short summary of the key features of both Lambda expressions and streams before moving on to some real world examples of how to use them effectively.
Monica Beckwith discusses the performance introduced by adaptive compilation in the OpenJDK Hotspot VM, focusing on the internals of OpenJDK 8, the reference implementation for Java SE8.
Phil Webb offers tips and code samples on how to refactor existing code for the cloud, alternatives to the file system, compiling without the JDK, dealing with gateway timeouts and how to run Tomcat 7
Fredrik Öhrström discusses some of the latest Java features: multi-core support, lambda expressions, expanded target typing, method and constructor references, and default methods.
At QCon London 2008, Neal Gafter discusses language changes being developed for the JDK7; their interactions, how they are conditioned upon pre-existing language design choices, and API design.