Hi,
I have not tried it out yet, but there is en experimental version on openesb site to download:
"jbi-javase.jar is an experimental version at this point which makes it possible to run without an appserver. Just unjar the version and run the container with the following command: "java -jar lib/jbi_framework.jar". This uses 8699 for jmx port. If you need to use a different port, use -Dconnector.port=xxxx where xxxx stands for the new port."
An experimental prototype is available to play with - see Keith Babo's blog entry for details (http://blogs.sun.com/babo/entry/running_jbi_stand_alone) . I was able to install and play with the File-To-File sample myself.
Please be warned that not all SEs and BCc supported by the glassfish version, are supported on the Java SE standalone version right now (because of code dependencies) - for example HTTP BC and Java EE SE