Combat Commander gets your blood flowing.
N.B. Using a comma is like BCC rather than CC because the recipients don't see who else is receiving the GeekMail, so if you want them to know that there are other people receiving the same message then you'll need to tell them in the body of the message.
Oh, that's not very convenient! I can't really think of a use for BCC on BGG but perhaps someone would like to do it.