] A reader wrote to point out that weblog.infoworld.com is
] categorized by SurfControl as "Usenet News" and is,
] therefore, being blocked for people in organizations that
] deploy SurfControl's server-based filter.

If laws that require libraries to install internet filters require libraries to enable categories like "usenet news" for filtering, then those laws are trivially unconstitutional. By banning all viewpoints that are not delivered by established news media, the government would be employing at restriction on speech which is not content neutral and has nothing at all to do with "protecting minors from pornography." If you see a library banning access to weblogs, I'm sure the ACLU would be itching to take them to court.