November 16, 2013: In early 2014, Google will change the sign-in screen for domains. Users will no longer see the colored sign-in screen, and school/business logos, where they can type in their user names without the full gmail address. The Google Apps sign-in page can no longer be personalized with colors and custom logos. It will now look the same across all Google sign-in pages.
Sign-in pages will now be consistent throughout the different Google tools - gMail, Drive, Calendar, and all the Google apps services. Google will be providing more information about the change over the next few months, giving domain administrators an opportunity to alert their users.