You might find some of the following links rather useful:

Software Related:

• http://windowsupdate.microsoft.com
• http://office.microsoft.com/officeupdate/

Security Related:

• http://www.eeye.com/html/
• http://www.ntbugtraq.com/
• http://www.snort.org/
• http://www.insecure.org/
• http://www.sans.org/
• http://www.nai.com/us/security/home.asp
• http://securityresponse.symantec.com/
• http://www.sophos.com/virusinfo/
• http://www.eicar.org/

General IT:

• http://www.tek-tips.com/
• http://oss.oetiker.ch/mrtg/

Articles & Forums:

• http://www.theregister.co.uk/ — Technology news
• http://www.msfn.org/
• http://isc.sans.org/
• http://www.macosx.org  — MacOS X News and Resources
• http://www.osxzone.com — MacOS X News and Resources

Miscellaneous:

• http://www.mobiledia.com/reviews/
• http://ars.userfriendly.org/cartoons/   — Miscellaneous Cartoons
• http://www.megaconverter.com/mega2/ — Convert just about any known measurement.
• http://sourceforge.net/
• http://www.internettrafficreport.com/ — Internet Data Analysis
• http://www.caida.org/ — Internet Data Analysis
• http://www.woodstone.nu/ — Solutions Provider / Products
• http://www.nagios.org/ — Solutions Provider / Products
• http://www.snopes.com — Barbara Mikkelson’s excellent myth-debunking site (great for virus hoax and email scam info)
• http://www.convertit.com — Collection of online conversion utilities
• http://www.linux.org — Linux news and resources
• http://www.webmonkey.com — Web Design tutorials and resources
• http://www.asp-help.com — Active Server Pages resources
• http://www.pcpitstop.com — PC Performance tests and tune-up tools
• http://www.spamhaus.org/ — SPAM Block List service