I wrote a book titled Professional Web APIs with PHP back in 2006, and am currently working in Biomedical Informatics for a major public health company.
I’m working on a project to help developers called WonderProxy which has proxies all over the world. Working on GeoIP development? Now you can finally test properly! We've also released Global Ping Statistics for expected ping times between cities, as well as a Load Testing Tool to measure your site's ability to handle load. Our most recent site checking tool is Where's it Up? which checks your sites availability globally, returning HTTP, DNS, and Traceroute details