It is often interesting to run with -X and -Dbeanstalker.verbose=true. tail / tee to a file, like this:
$ mvn -Pdeploy -X -Dbeanstalker.verbose=true 2>&1 | tee log.txt
There's a mailing list at http://groups.google.com/group/beanstalker-users
Try the mailing list again, or file an issue
We also monitor both stackoverflow (use maven + elastic-beanstalk) and the AWS Forums, on a best-effort basis thanks to ifttt