I didn't say the passwords would actually log you in, just that they can be used across all services, they cannot be for example limited to mail as the person I

I didn't say the passwords would actually log you in, just that they can be used across all services, they cannot be for example limited to mail as the person I was responding to stated. So you could use an app specific password across Google's various APIs and app accessible content - Talk/Gchat/Jabber, Blogger, YouTube, Picasa, Reader, and so forth, there's a fuller list in the docs for two-factor auth. (I have personally made app specific passwords for IMAP, Jabber and Reader, and I used to use a third party client to post to Blogger - the passwords are interchangable.) (I'm not the one who downvoted you, by the way, so I can only guess at why.)