sudo,file perms, and fetchmail

[Ben Luey <lueyb@gridley.ACNS.Carleton.edu>]

I want to allow anyone in group admin have read/write access to the global
fetchmailrc file -- if I change the perms on it to allow this, fetchmail
says this is a security problem and won't run (perms must be 700). Is
there a good way to give grou admin access with sudo -- I don't want to
add a line for "vi /etc/fetchmailrc" since that will cause vi to be run as
root and doesn't strike me as very secure. 

Any Ideas? Thanks,

Ben