The following sites contain information about DB2, CICS and related products.

BMC BMC Software
CDB CDB Software
CODUG Central Ohio DB2 Users Group
DB2 Archives A DB2 Discussion List
Heart of America DB2 Users Group The Kansas City Area Group
IN-Dug The Indiana DB2 Users Group
IBM IBM's home page; everything you wanted to know, and more.
IDUG The International DB2 Users Group 
LAADB2UG The LA Area DB2 Users Group
San Francisco DB2 user group
Great Plains DB2 Forum The DB2 Group in Nebraska
LIGHTYEAR The IBM Business Partner for OS/390, DB2, CICS, and IMS information
MVS HELP A site with technical information about MVS and DB2
NEON Neon Systems
PCICSUGThe Pacific CICS Users Group
CA Computer Associates
SAS The SAS Institute
THEMIS Themis Education Services
Sheryl M. Larsen, Inc.
 

 Here are some links to the home pages of SWARUG members.

ADOT After you've seen enough DB2 go here for some interesting things about Arizona.
Allied Signal One of our Fortune 100 companies
NAU Northern Arizona University
PCS PCS Health Systems
SRP The Salt River Project