I am one of the authors of the powerful web data extractor, i.e. MetaSeeker, whose one of the differentiated features is to extract AJAX content. I have helped a lot of customers to extract a very large amount of materials from the Web. MetaSeeker runs autonomously and periodically. There are two approaches to finish the task:
1, I define the extraction rules and you run MetaSeeker which is very easy to operate
2, I run the tool and deliver the harvest to you