Congratulations to the eXo team for releasing eXo JCR 1.8!
It's cool to see the various JCR implementations evolve and grow. The JCR 1.0 standard is less than three years old, and there are already a number of independent implementations, both open source and commercial.
So far we've seen little cooperation (apart from JSR 283) or even much direct competition across the implementations, as I guess everyone is just busy grabbing market-share from pre-JCR vendors. But I wouldn't be surprised if we started seeing more benchmarks and feature comparisons on JCR repositories already during this year. I expect it to be fun!