From Wikipedia (as of 7/5/10):
Electronic mail, most commonly abbreviated email or e-mail, is a method of exchanging digital messages across the Internet or other computer networks.
Email is one of the oldest technologies on the internet and is still being used for feedback gathering or consultations today.
Email threads between two or more individuals can be used as discussions related to e-democracy. Additionally, emails can be used to send links to other tools, such as deliberation forums. Media and tools can also be embedded directly in emails, such as images, videos, or surveys.