OpenID is a critical piece of "Open Web" infrastructure. The ability to authenticate users without relying on a single gatekeeper entity puts every site on an equal playing field. As a result, community-driven, decentralized networks can enjoy all the same advantages as closed-source, proprietary players, and end users retain more of their autonomy and privacy. All of that sounds well and good, but it is not much use if you don't enable OpenID on the sites that you maintain. This weekend, why not add support for OpenID logins to your web service? You might be surprised how many LAMP and LAMP-like frameworks have a straightforward solution.