Here are a couple for Champaign County:

The Other Champaign County

http://theotherchampaigncounty.yuku.com/

Go Champaign

http://www.gochampaign.com/discussions.html

Here are some militia-related forums. The forums in blue font are the ones I am most active in. I usually go by the handle "Michael," "Molon Labe," or "Ohio Patriot."

Bigger Hammer

Fal Files

http://www.falfiles.com

SHTF Militia

http://www.shtfmilitia.com/

AR15 Adviser

http://www.ar15adviser.com/   Handle = Michael

CCW - Ohio

http://ohioccwforums.org/  Handle = Michael

Open Carry

http://opencarry.mywowbb.com/  Handle = Ohio Patriot

http://ocohio.myfreeforum.org/ (Ohio only)

American Minuteman

http://www.americanminuteman.net/

Update 28-Jul-08: It looks like this site is gone. :(

United Patriots of Ohio

http://www.upohio.org/

M14/M1A Firing Line
http://www.m-14forum.com/

The Combat Triad

http://www.thecombattriad.net     An excellent site.

Free State Wyoming Forum

http://www.fundamentalsoffreedom.com/fswforum/index.php

Zion's Camp (Mormon/LDS Patriots)

https://www.angelfire.com/ut2/zionscamp/

http://pub36.ezboard.com/bzionscamp

Assault Web

http://www.assaultweb.net

All About Guns

http://www.allaboutguns.com/

ArmsLocker

http://www.armslocker.com/forums/index.php

The Firing Line

http://www.thefiringline.com/

Nation of Riflemen

http://www.kimdutoit.com/

The High Road

http://www.thehighroad.org

Warrior Talk

http://www.warriortalk.com/

Lightfighter

http://www.lightfighter.net/

WarRifles

http://www.warrifles.com/forums/index.php

Revolutionary War Veterans Association (RWVA)
http://www.appleseedinfo.org/

Battlerifles.com

http://www.battlerifles.com/

Glock Talk

http://www.glocktalk.com

Full-Auto

http://www.full-auto.com

A Well Regulated Militia

http://www.awrmsignalcorps.org/

http://s15.invisionfree.com/AWRM_Logistics_Corps/index.php?

http://www.awrm.org/ubbcgi/ultimatebb.cgi

http://s7.invisionfree.com/Washington_Militia/index.php

Self Defense Forums

http://www.selfdefenseforums.com/

Sniper Country

http://www.snipercountry.com/

Gun Talk

http://www.guntalk.com/forum/

Service Rifles

http://www.servicerifles.com/

AR-15

http://www.ar15.com/

Tactical Forums

http://www.tacticalforums.com/

Survival Forum

http://www.survivalforum.com/

1911 Forum

http://www.1911forum.com/forums/

HK94

http://www.hk94.com/hk/index.php

HK-54

http://www.hk-54.com/board/

The Guns Network

http://www.gunsnet.net/forums/

Frugal Squirrel

http://www.frugalsquirrels.com/

The Maine Patriot Board

http://frost.bbboy.net/themainepatriotboard

Geeks with Guns

http://www.geekswithguns.com/

The Claire Files

http://thementalmilitia.org/clairefiles/index.php

Liberty Post
http://www.libertypost.org/

Free Republic
http://www.freerepublic.com/

Sniper's Hide
http://www.snipershide.com/

Sniper's Paradise

http://www.snipersparadise.com/

Weapons Board

http://www.weaponsboard.com/

Canadian Gun Nutz

http://www.canadiangunnutz.com

The Straight Dope

http://www.straightdope.com/