Having given thought to the course you anticipate your studies to take, by April 15th, each of you who began her/his PhD studies in August of 2007 needs to choose an advisor. This advisor will help you develop a Plan of Study (more on that later), gather an advisory committee and guide you through your exams. Usually, this advisor will continue with you as your Research Committee chair, although this is not a requirement.
Obviously, your choice of advisor will be guided by your academic interests; you may also want to talk with either Jane Goodman (current DGS) or Jon Simons (DGS beginning in August 2008) about your choices. Although it is always possible to change advisors, doing so repeatedly may slow your progress toward graduation.
Once you have selected an advisor, you'll need to make sure this person is willing to serve. When you receive confirmation, please drop me an email letting me know who your advisor is. I'll keep a record of this for your file. Please remember that choosing an advisor by April 15th is one of the "remaining in good standing" requirements for your AI gig.
Please post any questions in the comments section. I'm sure if you have a question, someone else has it too.