To find out what on your site is indexed on Google, go there and run the following search:
site:mydomain.com
Where “mydomain” is your domain name (change the . com if you have a different domain extension).
Click here for an example.
The usual URL at http://download.eclipse.org/technology/subversive/0.7/update-site/ doesn’t work for Workshop for some reason. This URL does: http://www.polarion.org/projects/subversive/download/1.1/update-site/