Question Regarding SPF and Mailing Lists

My hosting provider has asked me if I want SPF records setup for my domains. I
looked at these articles:
http://www.linuxjournal.com/article/7327, which took me to
http://www.openspf.org/Project_Overview, which took me to
http://homepages.tesco.net./~J.deBoynePollard/FGA/smtp-spf-is-harmful.html

My question is how does SPF work with mailing lists? If I send an email from
my home computer, which goes through cox's SMTP servers, to the list on the
mailman server at my ISP, and then mailman sends the email to everyone on the
list, will SPF work (I.e. is the FROM field set to cox's SMTP server or my
ISP's SMTP server), or will the email be blocked because there may not be an
SPF entry for all of cox's email servers. What about all the other members of
the list who send email to the list - could they be blocked?

As you can tell, I do not know much about the inner working of email.

Finally, what do you think about SPF?

Thanks!
--
Mark
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