The whois record mentions a contact at http://www.digital-z.net/ http://www.digital-z.net/ which returns <html> <head> <title>One...</title> </head>

The whois record mentions a contact at http://www.digital-z.net/ http://www.digital-z.net/ which returns <html> <head> <title>One...</title> </head> <body> <center> May you live in not too interesting dreams.<br> Thank you and good night.<br> </center> </body> </html> ... which would indicate they're gone. And the deadmansswitch.org has a footer that points to http://binarymonkey.com http://binarymonkey.com which has a 2008 copyright date. In one year the app's domain will expire which could be unfortunate if anyone expected an actual dead man's switch.