Towards the very end of the installation, I received some error messages. They looked something like this:

An error occurred while collecting items to be installed
  No repository found containing: net.rim.eide/osgi.bundle/1.0.0.67
  No repository found containing: net.rim.eide.bootstrapper/osgi.bundle/1.0.0.67
  No repository found containing: net.rim.eide.preprocessing.hook/osgi.bundle/1.0.0.67

Quite annoying since it took me a long time to download the JDE ZIP file thanks to a slow Internet connection.  After a little bit of digging, I figured out that the three components I was missing were indeed not in the ZIP file that I had downloaded.  So rather than downloading the whole new ZIP file again, I thought I’d try another approach.

I went into the Eclipse Software Updates menu: Help->Software Updates and added the update site “http://www.blackberry.com/go/eclipseUpdate”.  I then refreshed the repository and looked for Plugin verison 5.0.0, highlighted the relevant checkboxes and clicked install.  Sure enough, Eclipse dutifully fetched the three missing bundles from RIM’s update site and finished off my installation.  I’m playing with OS 5.0 as I write this.