Guardian Digital (25 Nov 2003)
The Guardian Online has been my favourite online paper for a long time. I find that it, balanced against Samizdata is best.
But now, the Guardian is beta-testing a new service. It has both the Guardian and its sister paper, the Observer, and you can select any page from any section of the print editions and get a thumbnail view. Clicking on a story brings up the text of that story. Clicking a picture (even an advert) brings up that advert and you can get PDFs of any page. And you can go back in time to see old editions.
This is such a gob-smackingly cool service I might even start paying for it when it leaves beta phase.