Friends with webpages, in alphabetical order

George Alexander - Master of The Gab, fellow math nerd, addicted to WoW.
Brandon Castagna - Possibly the best coder out there. Member of the elite breed of dorks who are actually cool.
Shep Kendall - Master of networking, security, exploits, and flaming people; musician, pilot.
Bobby Noell - The most successful laid-back person I know, and demigod of computer security.
Josh Patterson - Genius. Period.
Josh Street - Gamer, family man, tragically afflicted with Asperger's, kindred intellect.

Mathematics Places

Society of Industrial and Applied Mathematics (SIAM)
American Mathematical Society (AMS)
Mathematical Association of America (MAA)
Maple
Maple Applications
MATLAB
Wolfram & Mathematica
Eric Weisstein's Mathworld

Physics Places

American Institute of Physics
Physics Forums
Hyperphysics

Linux Related

Gentoo Linux
Slackware Linux
Debian Linux
kernel.org
LVM HOWTO
ReiserFS
Linux virtual server project
Beowulf project
Linux from scratch
Fluxbox window manager
Themes

Security Related

CERT
Security focus
insecure.org
Ethereal
Ettercap

Networking Places

Netfilter
LARTC
Zebra
TLDP
Linux IP Routing
Linux sysctl tutorial
IP calculator

Standards Related

ISC
W3C
IETF
NTP

Open Products

Mozilla
Bugzilla
Apache
Open SSL
Open LDAP
Open Office
Open AFS

Programming Places

Java
Sourceforge
How to write bad code

General Computer Related

e-Racks
CDW
Apple
Quit Slashdot!
Slashdot
Thinkgeek
Synergy - this RULES if you have one keyboard/mouse for multiple computers & monitors!
Really Slick Screensavers

Miscellaneous Places

Digital Blasphemy
UNCC
NCSU
Front Line Assembly (FLA) - One of the best bands ever.
Delerium
Maddox, especially this, this, this, and this.
Yardman - You gotta be kidding me...
Gaping Void