Please pass my feedback also, I agree with the poster that we need this feature! Comcast is really behind on this now as Apple is now partnered up with over 400+ TV providers supporting SSO.
Click here to see a full list of providers that support SSO
Its like everyones onboard but Comcast now, this includes its competitors like DirecTV and DISH...
And having SSO for iOS doesn't count because I pretty much never watch the content on my phone..