Hi bjk,

you could try our freeware addins for Outlook: Public Contact After Reply
for Outlook:

Public Contact after Reply for Outlook (Public CAR for Outlook) is a
freeware addin for Outlook, which create automatically an Outlook contact
after reply to an email.
http://www.publicshareware.com/outlook-public-contact-after-reply.html

This supports also "take all email addresses" if you click on "reply"

For existing emails: Public Mail 2 Contact for Outlook (freeware)

Public Mail 2 Contact is a freeware addin for Outlook  It generates Outlook
contacts from existing e-mails and verifies whether the e-mail-address does
already exist as contact in Outlook.
http://www.publicshareware.com/outlook-public-mail-to-contact.html

also available on the microsoft server:
http://office.microsoft.com/en-us/marketplace/EM101932941033.aspx?CategoryID=CE0
11869211033

Maybe it helps.

--
Oliver Vukovics
Share your Outlook PST files without Exchange: Public ShareFolder
Synchronisation for Outlook and Exchange: Public SyncTool
http://www.publicshareware.com