I had a nice chat during the JavaOne 2012 conference in San Francisco, which was recorded as a Java Spotlight Podcast.
In the second part of the interview I misunderstood Roger's question: "Are you using JDK 1.7 in your projects"? and had for some reason the JDK 1.8 features in mind. My answer was at least "inconsistent" :-). Clarification:
I'm using JDK 1.7 features whenever possible in my consulting work. If it is unclear whether we get JDK 1.7 in the production, we don't use any JDK 1.7 syntactic sugar. However, all of my recent open source projects like http://lightfish.adam-bien.com or http://connectorz.adam-bien.com are using JDK 1.7 features already. I also planning to upgrade http://x-ray.adam-bien.com as soon as possible to JDK 1.8 (and lambdas).
However, I'm really looking forward for JDK 1.8. It is going to be a bigger deal. Lambdas with extended collections and Nashorn will have a greater impact on the code, than JDK 1.7 has.
Online workshop: Java EE 7 Bootstrap