Hacker News Reader

Not exactly the same, but in the same vein, Reddit has a "Random" button that takes you to a random subreddit. Google has "I'm Feeling Lucky" which gives you a random search. A "random" button seems like a relatively common little easter egg.

This sort of thing is a feature I often feel is missing, sites have "last week", "last month", etc., and you can see what stories have been top. But you can't then go back to last month and see what the top 'stories' for the preceding month were.

Surprised by the surprise too but why not, but to answer, xkcd.com has it.