For the record, danieltenner.com has had 50k visitors in a day from just reddit + HN...
The problem also usually comes up when comments start to add up (another reason why disqus rocks). http://inter-sections.net/2007/11/13/how-to-recognise-a-good... had a couple of hundred comments within a day, and since Wordpress (it was on WP at the time) didn't cache them, the page load got excruciating.
That's not a problem for http://danieltenner.com anymore, since comments are now served by disqus, and the pages themselves are static html. I suspect I could take several "full" slashdottings at the same time now and still stand. Nginx is pretty good at serving static files.
Then again, how much traffic I really received I'll never know. If you're doing more than 50 connections/sec, they shut down your account so their other clients "don't suffer".
I promptly moved. And I don't recommend them.
Still don't like it though, but my main requirement is root access. :)
Give your hosting company a heads up that you got slashdotted and they were more than capable of handling it and send them your thanks. They should appreciate it! :)
The top story on slashdot is there for about a hour so I would expect that they would come in as big spike at the start and then drop off.
Shame they totally screwed up a few months down the line and I was forced to move host.
In any case, details on how you did it would be most interesting. What kind of changes(if any) did you make to your "hot" page?