BugMeNot
http://www.bugmenot.com
59140 sites liberated.
“mechanism to quickly bypass the login of web sites that require compulsory registration and/or the collection of personal/demographic information”
and it rocks with the firefox extention Just click bugMeNot from context menu, whenever you encounter any authentication. It will fetch the data from bugmeno.com and log you in. Really helpful.
They have a philosophy too. of liberating the websites. visit their faqs.
BugMeNot rocks.
between “NYTimes recomends bugmenot!” 
