Splunk Sales has loads of those, contact them or your regional Splunk Partner.
Using Splunk in a Linux Enterprise environment can be quite a wide field, so it's best to discuss what you're actually looking for.
The easy answer is "all of them". Access Logs, application logs, DB, whatever matters in your environment.
I am specifically looking for information on integrating Splunk with Apache and JBOSS. What are the standard logs to capture and maybe additonal logs from a support/troubleshooting perspective