Interesting, it looks like the WebObjects application(s) has actually been undeployed.
I poked around the main developer.apple.com for a bit until I got here: https://developer.apple.com/programs/start/safari/enroll.php...
Clicking the "Individual" button on the bottom throws up a WebObjects error: http://i.imgur.com/xcfZ5ip.png (Yes, that's probably the smallest I've ever made my Safari window. You're welcome, mobile readers)