Okay, now I am a little concerned. I just saw this
“3. I would like to update my application and provide you with additional information. What should I do?
You may not make changes to your application once it is submitted. Your application will be evaluated on the details you included in your file. Additionally, please do not send materials such as resumes, research papers, newspaper articles and writing samples as they will not be considered.” on Stanford’s blog at http://engage.stanford.edu/regular-decision-update-2/
Yet at the same time they have an Optional Update Form.
What’s going on here?