Laser Tag Message Boards
Tactical Action Games: Lasertag/Laser Challenge Message and Photo Board (A great message board).
The Unofficial Lazer Tag Messageboard (Another great Message board!)
 

North American Lasertag Sites
1SourceLaserTag.com   (Tons of great tag gear information by David Roman in Oregon.  Online tag gear sold here.  Don't miss this site!)

ADEQUATE.com Lazer Tag Reference Guide
Battle Tag Main
Calgary Laser Challenge Group   (An outstanding group of Laser Challenge players in Calgary, Canada.)
CIA Lock-on (Tag group in New Hampshire which use sega lock-on gear)
Denver, CO, USA Laser Challenge Site
ESS Homepage
Eastern Maine I-R Club  (A very active team of players.  Rumored to be going under reorganization.)
Frankie's Laser Challenge Page
  GPL Laser Tag Resource (Developed by Andy in Indy (Indianapolis)- Excellent Home Built Tag Gear Information)
Hesher's Laser Challenge Home Page: Milwaukee, Wisconsin, USA
Khan Jal's Laser Tag Links Page 
Lafayette Lasertag Club, Indiana, USA (An excellent website with great info, the club (Lafayette Lasers) is still active.)
Laser Challenge in Los Angeles CA, USA
Laser Challenge Pro Club
Laser Challenge V2: Covert Forces   
Laser Challenge: The Carmel Chapter
LaserBlitz Home Page (St. Louis, MO, USA) (A great site with lots of information.  This guy is obviously obsessed!)
LazerOps   An outdoor laser tag arena in Northern Wisconsin.   (Great prices, looks like tons of fun! Great pictures!)
MGLT: Middle Georgia Laser Tag League  (Cutting Edge Website!  Great Information!  Custom Laser Challenge Gear!)
Panhandle Region Extreme Laser Tag (Laser tag in the Alabama, Georgia, Mississippi and Florida area)

Rick's Laser Tag World
Romeoville Laser Challenge (Northern Illinois)
San Diego Laser Tag Club    A club based in San Diego, California which meets each week.
Seattle Laser Tag Club     (Seattle, WA WoW, ESS compatible gear Tag Club)
Shockwave: Custom Laser Tag Guns California Based Group
Silicon Valley Laser Challenge Association
Southern Maine Laser Challenge League
St. Paul Laser Challenge Webpage

Steradian Technologies, LLC   (Makers and Sellers of Excellent Tag Gear.  Great Site!)
The Strategy Zone   (New outdoor laser tag field in New Hampshire, USA.)
The Unofficial Lazer Tag Webpage (Great source for Lazer Tag history and information)

European Laser Tag Sites
AriYan Lasergun (A fantastic group from Finland, great pictures and excellent gear!)
Cannon Fodder Dave's Tag Website (A member of the UK Light Brigade)
Dave Bodger's Lasertag Info (UK Tag Site) (The ultimate site in homemade lasertag gear)
Dropzone 2000 UK Website (Also has info on Dropzone 2004!)
Fiat Lux! Technical Website (An excellent site!  Lots of technical info and gear for purchase)
GNU Tag (German tag site:  Excellent information on how to make homemade tag gear.)
Laserchallenge Club Böblingen: German Laser Challenge (Written in German, but great pictures of the gang and V2 gun mods!)

Lazer Combat of Austria   New Austrian laser tag field using Battlefieldsports.com gear.

  Lasergame.de   A great German laser tag club which make their own gear.  Written in German but can be translated here (alta vista babelfish)
Light Brigade (UK Tag Site)
TAG: Tactical Action Games (Italian Lasertag) (English and Italian Versions!)
   Tag Tek (An evolution of Spartan Gun Design and Black-Watch Tag Club.  Lots of great information, homebuilt metal guns!)

Australian Laser Tag Sites
Battlefield Sports.com (Outstanding WoW Compatible lasertag site.  Highly recommended site)

Emu Gully Adventure Education  (Laser Tag on Watercraft,..a must see!)

Lasertag: Live Action Combat Game (Australian) (One of my favorite sites).

Melbourne Lazer League (New Australian Laser Challenge League.  Weekly Games!  Looks very promising!)

Razor Team Headquarters (Australian Tag Site) (These guys are great!)

Team Phoenix (An Australia Laser Challenge Club in the state of New South Wales)

Miscellaneous
Laser Challenge Webring (A webring of various Laser Challenge and Lasertag site around the world)
The Laser Game Link Pages
The Complete Tagger 2     Acrobat Reader .pdf file: homemade Laser Tag Electronics  (grenades, tag circuits, sensors, etc.)