A while back, when the teresco.org domain was on a network that permitted it, there was a mailing list to which each site update sent a notification email. With the switch to having Gandi manage teresco.org email, I believe I can now create a forwarding address with a significant number of email addresses that will allow these notifications to be distributed. If you would like to be on such a mailing list, please send an email to travmap@teresco.org and I'll add you.
Also, is there any interest in an email list for project news, like new system activations, new feature, etc.?