Hi Darel,
I was wondering if a person could use Mozilla Thunderbird with Yahoo Mail etc.
Apparently the answer is yes.
My ISP uses an Email server  called "Zimbra Collaboration Suite". which is very much like Yahoo Mail and it also resides on the internet..
I use Thunderbird to download all my email so that it is resident on my computer, and it also deletes it from my Zimbra account automatically.
This solves allot of the problems that an online mail service creates.
Take a look at the following:
http://www.mozilla.org/support/thunderbird/faq
http://www.mozilla.org/projects/thunderbird/specs/extensions.html
http://email.about.com/od/mozillathunderbirdtips/qt/et_free_yahoo.htm
http://www.makeuseof.com/tag/switching-to-mozilla-thunderbird/
http://www.howtogeek.com/howto/internet/firefox/get-your-yahoo-mail-in-mozilla-thunderbird-for-free/
http://www.mozilla.org/projects/thunderbird/specs/extensions.html

I think allot of the club members could benefit by converting to a program like Thunderbird.
Regards,
Don