And about the 4K stipend - I was kinda annoyed that they called it a stipend when really it's more like a Work study type thing. Though the research opportunities sound interesting.
Hey I got the same letter. I emailed the dean about it and she called me right back, saying that the money was reserved for those who were sure to enroll in W&M, for whom W&M was the first choice, etc, and that all it required was a statement of interest explaining why W&M is your first choice. She kinda scared me off even though she didn't mention that it was binding, though to be honest I was so shocked that she had called me only minutes after I sent the email, that the conversation wasn't really productive and I didn't ask any questions.