PubSub

In the online edition of the Wall Street Journal, today's freebie, New Web Watching Tools Pique Interest of Investors by Scott Patterson and Worth Civils talks about persistent searches conducted online by PubSub and others. What makes PubSub worthwhile is you don't have to launch a news reader/aggregator and it scours blog feeds for content that matches your keywords. In addition, you don't even have to sign up for the service. You merely bookmark the feed URL and return to it to see if any content has been gathered.

PubSub also has a downloadable sidebar for Firefox and IE browsers so you wouldn't have to go to the bookmark to see new content. If you read blogs and want to find new content from blogs you don't know yet, this is a magnificent tool. Plus, it's FREE.

http://www.pubsub.com/