There may be many Internet sites like Harvard Business School's Working Knowledge. If so, let us know about them in comments section. We're noting this Harvard site because it provides early access to work by the Business School faculty -- "a 'first look' at cutting-edge ideas before they enter the mainstream of business practice." This provides a great resource for PR people.
For instance, Jan. 12 has a two-part piece, in PDF format, on "striking a deal with someone in another cultural context." That can be "if not easy, then at least easier. Assess, Don't Assume,'" advises HBS professor James K. Sebenius. He explains how to do your homework, adjust strategy and tactics, and negotiate across borders.
Much of the work posted may not be of immediate interest to generalists like PR people, but it has enough gems to make the site worth regular visits.
Another Harvard source, this one Harvard Humanitarian Initiative, has a paper, "Applying Technology to Crisis Mapping and Early Warning in Humanitarian Settings." It might be of value in the context of Haiti.