Plots trends in the growth of Internet use. Discusses pornography on the Web, using filters, and the ALA response. Reports results of a survey of Internet availability within Pennsylvania public libraries. Findings indicate more than 90% of respondents offer access to the Internet, nearly 80% do not use filters, and 50% attempt to control access to specific content, generally through acceptable use policies. Survey questions are appended. (Contains 29 references.) (AEF)