For those of you who are trying to get to the page about Google Sitemaps you might want to try back later. Currently it is serving up a 502 Server Error, reason being is a simple mentioning over at Slashdot.
That's funny, Joey! As soon as you said that, I told myself--"it must have gotten Slashdotted." Sure enough, it's the top story on http://slashdot.org/ right now. The info about Sitemaps may be running on a "normal" webserver instead of our custom setup. I'd wait for the stampede-o-technical-folks to subside; maybe read the Slashdot thread or give it a few minutes up to a half hour for the geek-slagging to stop.
I alerted the Sitemaps team, but a Slashdotting is hard enough for a regular webserver, let alone one that's doing https. I'd give it a few minutes.