A service that updates different search engines on a particular blog when content has been updated.
Regular checks of downstream services to ensure they are legit and still work. Includes “common” services (22 sites) and “specialized” services (5 sites). Services to Ping-o-matic include: Weblogs.com, Feedburner, MyYahoo, BlogRolling, Weblogalot, Topic Exchange, Bloglines, Collecta, Blo.gs, Syndic8, PubSub.com, BlogStreet, Icerocket, Google Blog Search, Post Rank, Technorati, NewsGator, Blogdigger, Moreover, News Is Free, Spinn3r, SkyGrid; Specialized sites: Audio.Weblogs, RubHub, GeoURL, A2B Geolocation, BlogShares. Make sure to only ping specialized services if they're relevant to your blog, otherwise you'll cause an undue burden on them.
Parent organization is WordPress which just received the Overall Best Open Source CMS Award in the 2009 Open Source CMS Awards.