Log in with Google account and you can't read the GReader stream? This makes me nut.
I think I did say everything on the title. Once you have people logging in with a third party OTP, it mean you are effectively able to gather relevant info on the entire account.
What's the point to not read the GReader stream and import automatically saving the hassle for people to export and import their OPML again?
Chris Swenson commented
I don't think the entire data set is available through the API. Further, Reader will be dead soon, including it's back-end, so developing something that is so temporary doesn't seem worth it.