Click on the following links. Please note these will open in a new window.

http://www.vletter.com/products_vl_sig.htm
vLetter
You can now order your signature font online.  Personalize and authenticate what you compose and send electronically.  For about $30, VLetter will transform your handwritten signature into a font, actual typeface that you can insert into any document.  VLetter will e-mail you a small font file to install on your PC or Mac, usable with all your word processing and graphics software.

http://www.webfoot.com 
Webfoot
This site describes techniques used to communicate using e-mail.  Its contents include reasons why e-mail is different, page layout, intonation, gestures, and more.  The site also provides links to sites that describe other viewpoints.

http://www.everything-email.com/
Everything E-mail
Practical information on how to use Signature Lines, e-mail discussion groups, netiquette, and other technical information on software, switching e-mail accounts, international resources for e-mail, and website e-mail suggestions.

http://www.mindtools.com/phoneskl.html
Mind Tools Bookstore
This site offers advice on how to be effective on the phone.  The tips revolve around being sharp and professional on the phone, including making and taking calls.

http://videoconferencing.com/
Video + Conferencing
Devoted to the education of the world on videoconferencing.  Articles about products and services, forums for questions and ethical issues.