GMail team is now preparing for a new sign in page which should be out soon. The new design is now much more slicker, simpler, and as always, it's flat page with white as the most dominant color, as typical Google's work in most of their products.
Once you signed in for the first time, you will have a chance to change your profile, including activating two-factors of authentication and even deleting all your profiles and social-related datas. I think Google is working hard to make sure that users has better access to their privacy preferences.
I like the new page and salute to Google for their hard work