Moreover, we're indebted to BuildHive for checking over 500 pull requests to date! On a build side, we currently validate both JDK6 and JDK7 on each pull, thanks to Andrew Phillips.
Please update to jcloud 1.5.3 and check the new features. Particularly, try things out using JDK7. If you have questions, ping our user group or tag your question with jclouds on stackoverflow.
We are working on 1.6 now, which includes a lot of cleanup and mechanisms to make less api calls when starting groups of machines. If interested in helping us out, hop onto IRC freenode #jclouds or join our dev group.