We first jumped on the OpenID bandwagon back in 2007 when it was seen as a promising way to make logging into websites simpler. What we’ve learned over the past three years is that it didn’t actually make anything any simpler for the vast majority of our customers. Instead it just made things harder. Especially when people were having problems with the often flaky OpenID providers and couldn’t log into their account. OpenID has been a burden on support since the day it was launched.
Found through Daring Fireball.