A Guide to Email Signatures: An article on creating sensible and professional looking email signatures.
Making Your Mark: Expressing yourself through someone elses words is just one way of making a signature file. From About.com.
My Favorite Signature Quotes: Collection of signatures and quotes to be used in email signature files.
Siglets.com: Free Signature files for email. Includes ASCII pictures, HTML and quotations.
SigMania: Members-only Yahoo group for making signatures. Willingness to share is a must here: signatures, email signatures, tags.
Signatures, Smileys & Acronyms: Links to information on email signatures, smileys and acronyms, from your About.com Guide.
Subject: Funny Email Sigs: One line signatures captured from the Internet.
The Gallery of Annoying Email Signatures: Signatures that are annoying and provide no useful information.
Whistle Stop Cafe: Personal forum with cooking tips, recipes, and simple signatures. Signature requests are welcome.