The best way to contact Alex Wellerstein is by e-mail: wellerstein@gmail.com or awellers@stevens.edu (they are both actively checked). In the event of an unexpected delay in a reply, please feel encouraged to send a polite “nudge” (the volume of mail can be difficult to deal with on top of everything else).
You may also find it useful to follow him on Twitter: @wellerstein, or his blog.
Please direct all postal correspondence to the following address:
Alex Wellerstein
Stevens Institute of Technology
1 Castle Point Terrace
College of Arts and Letters
Hoboken, NJ 07030-5991