Kerpau!

GFI Email Security Testing Zone
http://www.gfi.com/emailsecuritytest/

FILExt - The File Extension Source
http://filext.com

Slashdot - News for nerds. Stuff that matters.
http://slashdot.org

digg
http://www.digg.com

DNSstuff.com - DNS tools, DNS hosting tests, WHOIS, traceroute, ping, and other network and domain name tools.
http://www.dnsstuff.com

SANS Internet Storm Center
http://isc.sans.org

Smart Network Data Services
https://postmaster.live.com/snds/

AOL Postmaster
http://postmaster.aol.com/

Brian Madden - Your Independent Application Delivery Resource
http://www.brianmadden.com

Google Reader
http://www.google.com/reader

OSNews - Exploring the future of computing
http://www.osnews.com

Windows Sysinternals
http://www.microsoft.com/technet/sysinternals

Microsoft Script Center
http://www.microsoft.com/technet/scriptcenter

Google Groups
http://groups-beta.google.com/

SANS Institute - Information and Computer Security Resources
http://www.sans.org/resources

BOFH
http://www.theregister.com/odds/bofh/

Winscripter
http://www.winscripter.com/