Finally (at Bob Flanders's encouragement and action), we have an open-posting mailing list for IBM 1130 enthusiasts to use for talk about anything IBM 1130-related. It's at Google Groups -- visit its web page if you're a subscriber already, or subscribe right here:
We also maintain a separate announcement-only list of 1130 enthusiasts for very occasional e-mail (the list typically gets only a few messages every year). The usual reason we write is to announce the "11/30" party and invite everyone to it; we've also written with changes to the website or news about an 1130 available somewhere. Please subscribe! We'd like to stay in touch with you.