These articles have something to say about the Yahoo! Girl Genius mailing list (usually, beyond merely referring to it).
“The Sneaky Gate ✣ is a secret entrance to Mechanicsburg. Jenka and da Boyz elect to bring Gil...The Sneaky Gate
“The fan term Moxana points originated on the Girl Genius Yahoo! Group. They're roughly...Moxana points
“The Girl Genius Yahoo! group is, according to its own description, "the FIRST Girl Genius fan...Girl Genius Yahoo! Group