Currently the osgi framework only works with plugins packed as jar files, not exploded jar files like the regular geronimo server. Since osgi can deal with classpaths inside a jar file, I rather think that we should proceed with this as standard practice for the rest of the server. However this will mean moving the archiving functionality out of the car-maven-plugin and into the deployer.
The alternative is to make sure that unpacked plugins actually work in osgi. I didn't experiment with this at all.