The authors discuss the information concerning suicide which is available via the Internet, including prevention & service information as well as how-tos & suicidal threats made by users. They report 2 separate cases in which threats of suicide were made somewhat indirectly & discovered over the Internet. Possible reasons for expressing threats via the Internet are considered, & the activities of the Samaritans, an organization hosting an Internet crisis intervention website, are briefly described. (5 refs)