You can contact the people involved in IBL SIGMAA in many ways.
The current Chair can be reached at iblsigmaa [at] gmail [dot] com.
You can follow along with IBL SIGMAA news on Twitter at @iblsigmaa.
IBL SIGMAA members are automatically enrolled in the MAA’s Google Groups mailing list. (If you go looking for this through the generic Google Groups page, you may have to “switch organizations to maa.org” near the top of the page.)
open comment box using a google doc set-up attached to the iblsigmaa address