Mailing lists are used by developers and users to communicate information about the projects. Currently, two mailing lists exist: the developers and users. To join the lists go to the following locations and follow the instructions there.
Searching the users mailing list
A search engine is available from Kitware Search Page. This will return hits from the IGSTK mailing list as well a the related projects (CMake, VTK and ITK) mailing lists.
The mailing lists are open to web robots, so it is possible to make queries on the users mailing list with the following link
Google search igstk-users.