Here is a link to the NetMath seminars, recorded and post-produced by Andrew Stengele.
Seminar 26 January 2012 Debra Woods
Seminar 2 February 2012 Bruce Carpenter
Seminar 2 February 2012 Patryck Szuta
Seminar 16 February 2012 Gloriana Gonzalez
Seminar 12 April 2012 George Reese and Ken Travers
Seminar 19 April 2012 Andrew Schultz
Seminar 3 May 2012 Deanna Raineri