Reports that seniors across America are experimenting with new technologies, and are taking to cyberspace to keep in touch with families and discuss issues. Focuses on the residents at the Charlestown Retirement Community in Catonsville, Maryland; Services available on CompuServe's Retirment Living Forum, and other services; Comments from Mary Furlong, a professor at the University of San Francisco and president of SeniorNet. INSET: Where to jump on-line..