Safari Reader will apparently stitch together (in some circumstances) pages from different articles. Pictured above is today’s Future Shock and Under the Knife from Baseball Prospectus. Maybe the stitching was triggered by the link at the bottom to the previous article along with the sequential article ID numbers in the URLs?
I assume 3 other people besides me find this interesting and 1 of them is on his way to Portugal.
I still mostly prefer Readability.