The best way to get in contact with us is to email psps@feynman.princeton.edu.
Also, for up-to-date event and meeting information, sign up for our mailing list by sending an e-mail to listserv@princeton.edu with the line "subscribe psps-announce" in the body. Sending "signoff psps-announce" will get you off the list if you change your mind. Alternatively, you can go directly to the LISTSERV web interface and enter your e-mail address.