Bulletin Boards

One Sixth Warriors

The Official OPERATION GLOBETROTTER post at OSW

The Sixth Division

OSS - UK 1/6 forum

UK 1/6 Collectors' Club

Cool 1/6 Stuff

EVA Models - Aliens: US Colonial Marines Armor

Customizers

Custom Dawg's 1/6 Custom Action

ghettoct's 1/6 Blackhawk & Hummer

Kaz's Custom

Loadsam's Military Site

MiniTroopers

One Sixth Blitz

Quiet Fart's Hideout

Sixth Squadron

Sixty Driver's 1/6

Manufacturers

21st Century

Armoury

Dragon

Blue Box

Hot Toys

Other Travelling Joes

GI Joe's Big Adventure: The Extended Summer '99 US Tour

Reference

Militaryphotos.net

Specwargear.com

US Air Force Images

US Army Images

US Marine Corps Images

US Navy Images

US Naval Special Warfare

Retailers

(not a comprehensive list, just some of my favorites)

The Battle Rhino

Dave's Hobby Shop

Echobase Toys

Good Stuff to Go

Opsgear

Outer Perimeter

Toys 2

War-Toys