I'd like to know who the acknowledged - and consulted - leaders are in
the web advertising industry.   These may be people who are employees
of large advertisers or agencies, or consultants (independent or
affiliated with appropriate organizations) who would likely be asked
to weigh in on proposed improvements in web advertising technology and
business models.

I would like names and affiliations at a minimum for any people
identified.  Any specifics about their expertise, knowledge, or
background would be helpful, as would an indication of any area in
which they are the sole expert.