Tired of checking all your favorite search engines and aggregators for the latest news on a given topic? MonitorThis, a beta service, has a solution. Enter your search and it will provide you an OPML file (which you can then import into your aggregator or feedreader of choice). For aggregators that let you put a bunch of feeds into a single folder, I'd recommend doing so -- MonitorThis gives you one feed for each service. One obvious way to improve the service would be to have MonitorThis perform the aggregation and provide a single feed for a user to subscribe to.