I think this is a real challenging one!
I write a website for my local football league, www.rdyfl.co.uk , and include javascript code snippets from the F.A\'s Full-T
The latest version of OutWit Hub is doing a pretty good job on dynamic content. The source scraped by outwit to extract links, images, documents and tables and text is the updated DOM. You can certainly make a job to grab what you need using these. Custom scrapers are still applied to the static source in version 1.0.3 but version 1.1.x (still in beta) will offers the choice between the static source and the dynamically modified DOM.
Scrapping content produced by Javascript is challenging. AFAIK you will need to do this with AJAX. Hopefully the content has some css that you can grab with jQuery or at least some id's. Do you have id's or classes that you can grab?