I have a client who uses a rich internet application and is wrestlng with the problem of recording page views with comscore. Without regular page requests my client gets undervalued by comscore in terms of page views. I read at http://www.techcrunch.com/tag/smugmug/ that SmugMug recently added a lot of Ajax functionality to the thier site and have found a way of updating URLs as people navigate the site. Does anybody know how they do this. Is it difficult technically?