We've revived the bundle.html diagram by limiting participation to sites with at least 10 pages and activity in the last year. Now, what links the various sites where we have only shown this as curvy lines. diagram 
github
The site connections are organized in an outline.
► connector site
► connected site
⇒ page on connector site, click to open
There is a lot of data. We don't fetch it all at once. Press or to get a clickable list of pages.
http://ward.dojo.fed.wiki/assets/pages/beyond-the-bundle-diagram/browse.html HEIGHT 300
Tip: If a site is unavailable the buttons ignore clicks. If a connection has changed a button can yield nothing. If a page is missing or very old it can report "illegal date".
pages/beyond-the-bundle-diagram