ASCII Arts Ring
Webring style collection of artists' sites featuring ASCII and HTML/ ASCII images.

ASCII Ribbon Campaign
Campaign against HTML mail, vCards and proprietary formats.

Respect ASCII Artists Campaign
Most ASCII artists will copyright their art by adding their initials or some other identifying tag. ASCII art is shared freely, to remove the artist's tag and steal the art or claim it as your own is very disrespectful to the artist and their generousity in sharing their art.

Shoot 'em ASCII Art Game
Game that uses ASCII graphics. Top scores can be synchronized with other users to see how good you are.

The Semi-Official, Semi-Serious ASCII Ribbon Campaign
Campaign against gratuitous graphics on the internet.

Wikipedia: ASCII Art
ASCII art history, examples, how-to, groups and links.