Just so I don't forget next time my computer dies, here is a record of how to set up Coldfusion to connect to an AS400 or iSeries database.
Login to Coldfusion Administrator
http://127.0.0.1:8500/CFIDE/administrator/index.cfm
Password: *********
Data and Services > Data Sources:
Data Source Name: anyName
Driver: other
CF Data Source Name: anyName
JDBC URL: jdbc:as400://[database ip address]/
Driver Class: com.ibm.as400.access.AS400JDBCDriver
Username: username
Password: ********
Save the jt400.jar driver in the Coldfusion directory:
C:/CFusionMX7/lib/jt400.jar
Add this class path to Coldfusion:
Server Settings > Java and JVM
Coldfusion Class Path:
C:/CFusionMX7/lib/jt400.jar
Submit Changes
Restart the Coldfusion service:
Control Panel > Administrative Tools > Services
Verify the class path:
Server Settings > Settings Summary
Check the last entry in CF Server Java Class Path
Verify the connection