Splunk is very flexible... maybe too flexible? What is that one thing that you have been wanting to do, maybe have been meaning to do, but haven't been able to make the time to do it, or figure out how to do it. It could be something weird, something that might not have a solid "business case" behind it, but you think would be sweet to have.
"Create a nightly, or hourly, report of hosts that we did not hear from in a while, since an hour for example." I can see this being extremely useful. Despite numerous monitoring checks every once and a while we end up with a LWF not running and users screaming because results are inconsistent.