Inspired by my recent marathon of reading Daemon by Daniel Suarez (a high tech thriller), I came up with the Node News Daemon project. It scans a list of RSS feeds for a list of phrases, and performs an action when a phrase occurs.
In the story, the evil mastermind was looking for certain events such as his obituary or having a protagonist saying a certain phrase, which would trigger other events to happen. Due to the distributed, event-driven nature of the Daemon, Node.js is the perfect platform for building such daemons.
There's a to do list attached, if the project is popular I'll take care of them, otherwise feel free to submit pull requests ;-).
Oh, if you want to thwart this daemon, contact Yahoo and have them throw in a GUID that is several GB's large on an article that triggers an event, thusly causing the process to run out of RAM.