From the ‘you can never have too many ways to test your network’ department: TurboBytes Pulse:
TurboBytes Pulse enables you to quickly collect DNS, HTTP and Traceroute responses from many computers around the world. Most of these ‘agents’ are connected to consumer ISP networks.
HTTP results from around the world for WordPress.com:
The source code is available at https://github.com/turbobytes/pulse.