Clarifying "reputation service" in section 7.7 of the Note

Section 7.7 of the Note lists available security information in the web
user agent that comes from a third party. The current text is:

    * reputation service
    * hyperlinks on visited web pages
          o introductions from friends
    * search engine results

http://www.w3.org/2006/WSC/drafts/note/Overview.html#third-party-source

The "reputation service" item seems too vague to me. The other entries
in section 7 are very specific. Could someone expand "reputation
service" into a list of specific security information available in
current web user agents? It could be that this item is actually already
covered by other parts of section 7. For example, installed CA
certificates are already listed in section 7.5. If so, we should remove
the "reputation service" item from section 7.7.

Thanks,
Tyler