PayPal Introduces Open API
The single letter .COM/.ORG/.NET domain prohibition was enacted prior to the existence of ICANN, however, existing single letter registrations were grandfathered in and were able to be kept. No exceptions have been granted after the prohibition started.
(Useful) Stupid Regex Tricks?
Why isn't 0.0.0.0 or 10.* a valid IP address? Since when is the definition of IP address to be unicast and globally routable?
I'd rather take issue with the fact it completely fails on IPv6 addresses.