The “cool hack to solve a maze using Photoshop” post got, in turn, posted to reddit, Make.zine, then Digg, then Waxy’s links, fazed.net, then Boing Boing, then StumbleUpon. Pretty popular!
If you’re interested, here’s my referrer graphs. Basically, Digg wins, in terms of quantity at least if not quality, with a massive 40,000 visits — there’s a real long tail in hits there…