The servers were indeed melting after engadget, gizmodo, HN, and reddit all ganged up on us simultaneously but the fires have been put out and we're now happily serving anyone interested.

For the curious ones, when the reqs/s number reached about 220 and the server melted, I had to figure out a new solution.

No problem, as I have selected Linode to be our VPS provider and was able to upgrade from a 360MB RAM Linode to a 1080MB one in about 15 minutes of downtime. Some apache tweaking was needed, of course, but now we're pushing all the traffic that is required with quite a bit of room to grow.

Thanks for all the upvotes.