Welcome, Digg users! You killed my server!
My little server is a little underpowered, at least for any real amount of traffic. It wasn't ever intended to pull in the kind of load that digg.com started sending it immediately following my presentation at the PLUG meeting.
For now I've set up a redirect to the mirror that Ryan Simpkins was so kind as to put up. When things die down a little bit, I'll go ahead and put the tutorial back up on my own site. Hopefully my server can at least handle the redirect traffic for now.