People in Place

For those of you who like their history urban and their websites useful, I bring you this link to "People in Place: families, housesholds and housing in early modern London." What do you all think about this kind of thematic online history site? I like the accessibility of the thing, but I worry that the web will inevitably become crowded with them, and over time, as research changes what we know, it will be increasingly difficult to tell the outdated stuff from the new. Well, I don't exactly worry about it, but still.