I made a little library to watch for things, search for a keyword in those things, and then notify some people that the keyword was found in a thing.

Currently you can watch a twitter account for new tweets, or a web page for changes (only the diff between old and new page is searched)

The motivation was to watch for mentions of 'pliny' in certain feeds and pages for some friends of mine who are playing the pliny scavenger hunt SF Beer Week.