It's not too late for you to choose your guild and join the guild race! We know new players, or players who might be coming back to Magic, identify strongly with their guild and still want to ally themselves with their guild, so you can still do it! Visit PlaneswalkerPoints.com, sign in with your DCI number, and then click the "Choose Your Guild" button.
With the guild race nearing its end we will be disabling the ability for players to change from one guild to another on May 9th, 2013. After that you're committed to your guild!