On April 18, 2013, Mark Reinhold from Oracle blogged that the release of Java 8 is being delayed so that they can focus on security issues.
"Security vulnerabilities related to Java running inside web browsers have lately received a lot of public attention."
Many may debate the use of the word "lately" in this post, but I'm happy to hear Oracle is claiming they have "upgraded [their] development processes to increase the level of scrutiny applied to new code, so that new code doesn’t introduce new vulnerabilities."
With the new focus on security, Mark lets us know that the "GA release in early September, is no longer achievable."
It appears that the part of Java 8 that is most impacted is Project Lambda, a feature that "aims to support programming in a multicore environment by adding closures and related features to the Java language." (http://openjdk.java.net/projects/lambda/). Mark hints that it may be on the chopping block, but he would rather let the release date slip to ensure it is included.
Either way, it looks like we are going to have a rough nine months before Java 8 comes to term in early 2014.