I have found some entries in the registry that seem to correspond to the Google Plug-in Login.
HKEY_CURRENT_USER\Software\JavaSoft\Prefs\com\google\gdt\eclipse\login\... Raney -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.