Browsers.com Update
Everything you ever wanted to know about your Web browser. CNET will alert you to new browsers and security holes.

Computer Emergency Response Team (CERT)
The most authoritative source of information on Internet security incidents and vulnerabilities. From Carnegie Mellon University in Pittsburgh. Every computer network operator is on this list.

Electronic Privacy Information Center
This nonprofit advocacy group on issues of privacy and civil liberties offers biweekly alerts.

NewsLinx Headlines
Offers a daily compilation of headlines by E-mail, with links to articles, mostly on Internet culture and E-commerce. Also has alerts on Year 2000 and new software.

Spyonit
"Spyonit simplifies life online by helping you stay on top of the things you care about. You tell a 'spy' what to watch for on the Internet, and when something changes, it reports back to you wherever you are: by e-mail, instant message, mobile phone or PDA."