A lot of people are getting interested in IoT - there's big money coming, apparently, and just about everybody is going to get hired - but it's not always the easiest thing to get started with. That's where the Eclipse Foundation's announcement from JavaOne comes in: the Internet of Things is now quite a bit more Java-friendly.
This isn't a single standard to tie everything together - that's unlikely. Instead it's a stack to support three of the major IoT standards: MQTT, CoAP, and Lightweight M2M standards. Steven Lawson at IDG News Service describes the release as follows:
The stack includes implementations of three standards, coming from different projects within Eclipse: Paho, already being used by IBM, is a Java implementation of the client for MQTT, a widely used machine-to-machine connectivity protocol, and Moquette is a Java-based MQTT broker. The Californium project implements CoAP (Constrained Application Protocol), a Web transfer protocol from the Internet Engineering Task Force. Another project, Leshan, brings a Java implementation of Lightweight M2M, an Open Mobile Alliance interface between IoT clients and servers.
And given the prevalence and popularity of Java, the Open Stack for IoT should bring a lot more developers to IoT. If you're interested in first steps as far as Java and IoT go, the Eclipse Foundation's Ian Skerrett has already written up a few suggestions.