The ability to execute remote commands via the Pi is where I see great value as well.
If you have sites dotted around a large geographic area, then the ability to check latency and uptime information from the individual site via remote execute commands. (instead of central location)
A simple lightweight forwarder is would be a good option. Splunk has just released one of the Pi as well (http://blogs.splunk.com/2013/10/21/how-to-splunk-data-from-a-raspberry-pi-three-easy-steps/)