By now it is also possible to toggle between two modes on the toolbar: you can either show the callers or the callees of a selected plug-in. As mentioned in the earlier post, I wanted to be able to exclude Eclipse plug-ins in cases where the focus is solely on the dependencies between the self-developed plug-ins. Therefore I added a very simplistic filter capability. I provide the modified and updated version of this plug-in here (Eclipse 3.4.x) for your convience.
[Update 3.1.2010] Download for Eclipse 3.5.x