Hi Ceki and others, I thought you might be interested to know about "Metadata Advice": it's an outreach project by folk involved in the OSGi community, who are willing to offer advice to people trying to package their software so it behaves well in an OSGi environment. http://blog.osgi.org/2013/01/get-help-adding-osgi-metadata-to-your.html Since there's been talk on this list of problems due to cyclic dependencies between slf4j-api and the logging implementations, I thought I'd point it out. Although it's called "Metadata Advice", I think they're willing to offer some suggestions for other aspects of using OSGi, beyond simply adding manifest headers (which slf4j already has). Perhaps it's worth creating an issue on their bugzilla inviting suggestions for improving OSGi support in slf4j? Regards, Martin