Has anyone used Spring to configure Netty?
I'm looking for an example or description on how I can configure Netty with Spring.
Yes, you can. Look at the following jet java game server written in Netty, the servers are all configured using spring. Take a look at the server-beans.xml, netty-handlers.xml etc in this project for reference.
For configuring Netty within a spring web-app look at the following link.
[Update] Recently I have also blogged about doing it with a java only configuration using no xml.