Neil has put up a summary of the parts of his excellent OSGi tutorials at the EclipseZone.
- Part 1: Your first bundle
- Part 2: Interacting with the Framework
- Part 3: Dependencies between Bundles
- Part 4: Registering a Service
- Part 5: Consuming a Service
- Part 6: Dynamic Service Tracking
Very nice stuff if you're interested in learning about OSGi and are mystified by the spec.
Of course, the Spring/OSGi framework makes all of this a piece of cake - ;)