I think this page uses iframes very nicely. They do something like this:
Sample material for the article is included in iframes that are sized to the flow of the text. The content inside the frames is available for scrolling and further examination, but the flow of the article isn't broken.
Frames as part of page compositing (those ugly "homepage" menus) are just ugly and non functional, but here it's really just a visual resource that just happens to be a website. That's much better,