trackerjacker also provides a simple python plugin system that makes it trivial to extend to do all sorts of interesting things (e.g. to look for anomalous wifi devices). One of my original use-cases was to trigger my sirens if a security camera detected motion (based on a data thresholds that uploading a video triggers).

I demoed this at Thotcon and DEFCON this year and will be demoing it at Derbycon in October.