"The Squad is a virtual one. No formal application is required, no qualifications check. You can join it by simply adding your name to a table in the wiki, and by introducing yourself on the IRC channel. You don't even have to be a developer in order to participate, testers are welcome too - be they professionals or mere passionate power-users. Working in virtual teams, and focusing on one package/component/application at the time, each volunteer can contribute by identifying a bug, suggesting a better way of implementing a feature, or actually fixing and then verifying the identified bug."
(via)