|Actually, how would one go about finding out which version of listserv
|your list is running on?  Is there a command I can send to
[log in to unmask] to tell me this?

Often times the mail headers generated by LISTSERV will include such info.
Otherwise mail the listserv the command

RELEASE

It produces a multiline output, the first line of which might appear
something like:

 LISTSERV(R)-TCP/IP for VM version 1.8c, managed by: