[Mailman-Users] how do we unsubscribe entire list?

[levantinecenter at levantinecenter.org]

Dear Barry Warsaw,

I am trying to set up Mailman through our host, Hostway, to use 
Mailman as a newsletter
anounce list only. I have subscribed my list to it without yet 
posting a newsletter,
but I want to remove everyone first, and re-enter a whole new and revised list.
How can I mass-unsubscribe the list?

Also, is there a place where I can find the html code I need to post 
a subscribe
area for the newsletter delivered by Mailman on our site?
The page is http://www.levantinecenter.org/pages/signup3.html

thanks!

best, Jordan Elgrably