How do I find out the "Id" of a folder?

[Bus]

Is there a way to determine the folder Id from within my MailChimp
account.

[jesse]

Via the API , you can simply use the campaignFolders() method:
http://www.mailchimp.com/api/1.2/campaignfolders.func.php

Via the web app, you can find it by digging through the source of the
main campaigns page or getting the archive code for a folder and
finding the fid parameter.

jesse