It seems that Yahoo is allowing users to use their Yahoo IDs as OpenIDs. This will make some other sites want to use OpenID for authentication, because who want

It seems that Yahoo is allowing users to use their Yahoo IDs as OpenIDs. This will make some other sites want to use OpenID for authentication, because who wants to manage credentials if you don't have to? However, if I'm understanding it correctly, this will not allow people to use OpenIDs that are not obtained from Yahoo to log in to Yahoo. It seems to me to be solving half of the problem (needing new credentials for every website) but not the other half (having a corporation be the repository for those credentials). If anyone with more of a clue can explain to me how this is not a base perversion of one of the major ideas behind OpenID, I would be obliged. ("You get to choose the OpenID Provider that best meets your needs and most importantly that you trust," from openid.net/what/)