Be sure to check out this site for a more comprehensive list: http://www.computerpoweruser.com/LanYard/calendar.aspx

(Weekends)
Sept 5 - LAN Fest 09 - http://www.lanfest09.com
Sept 12 -
Sept 19 - LANWAR - http://www.lanwar.com/
Sept 19 - SLP XV LAN - http://event.spartylanparty.com/
Sept 26 - LAN OC - http://lanoc.org/viewtopic.php?f=29&t=1550
Oct 3 -
Oct 10 - NeXus LAN - http://www.nexuslan.org/
Oct 10 - UWL CSClub Gaming party - http://www.lanclan.us/alp/
Oct 10 - GBLAN - http://www.gblan.com/phpbb3/
Oct 10 - Reaper's LAN in Fort Wayne - http://www.fwgamers.net/index.php?name= ... opic&t=417
Oct 17 - Catacombz 12.0 - http://www.catacombz.com/
Oct 24 - LAN OC - http://lanoc.org/viewforum.php?f=52
Oct 31 - The GLX - http://www.thegxl.com/
Nov 7 -
Nov 14 - IU LAN War - http://www.iugaming.com
Nov 14 - PLAN - http://whatistheplan.com/
Nov 21 -
Nov 28 -
Dec 5 - The Bluth Family LAN - http://www.lanevents.net
Dec 12 -
Dec 19 -
Dec 26 -
Jan 2 -
Jan 9 -
Jan 16 - MidWest LAN - http://www.midwestlan.com/
Jan 17 - IndySmash - http://www.indygamers.com/vB/index.php
Jan 15 - KansasLAN - http://www.kansaslan.com/
Jan 15 - Catacombz - http://www.catacombz.com
Jan 16 - LANWAR - http://www.lanwar.com
Jan 16 - MidwestLAN 11 - http://www.midwestlan.com/
Jan 23 -
Jan 30 - FWGamers LAN - http://www.fwgamers.net
Feb 6 - GBLAN - http://www.gblan.com/phpbb3/
Feb 6 - SLP LAN - http://event.spartylanparty.com/
Feb 13 -
Feb 19 - AWOL LAN - http://www.awollan.com/
Feb 20 - LAN OC 5.5 Mini - http://lanoc.org/
Feb 20 - KILANFest ver. 9.0 - http://www.kilanfest.com/
Feb 27 -
Mar 6 -
Mar 13 -
Mar 20 -
Mar 27 -IU LAN War XVIII - https://www.iugaming.com/
Mar 27 - NeXus LAN - http://www.nexuslan.org/
Apr 2 -
Apr 9 -
Apr 10 - Stompfest LAN - http://www.stompfest.com/
Apr 16 -
Apr 23 -
Apr 30 -
May 7 -
May 14 -
May 21 -
May 28 -
June 4 -
June 11 -

Let me know of any new LANs that could be added to the list; I try to keep it up to date as much as possible.

Updated.

LanOC MiniLan 5.5

When: 2/20/2010 11:00 AM - midnight
Where: Ohio City Community Building (304 Lambert St, 45874)
Cost: $5 pay at door
Capacity: 50
Games: TBA

Signup Page: http://lanoc.org/?option=com_mls_events&task=details&eventid=1 (if you have not registered for their site previously, click the top-right "Register" link)
Discussion: http://lanoc.org/forum/topic?id=227

EDIT: I see now that you may have already had this posted ... You have two Feb 20's but they're not adjacent so I think I skipped over them when looking.