There are a few of these “auto-posting” bots around. I’m definitely not a proponent of stealing content, but these tools have some uses. There are a ton of feeds around the net which could be leveraged for content in a white hat way.
FeedWordPress is an open-source Atom/RSS aggregator for the WordPress weblog software. You set up feeds that you choose, and FeedWordPress syndicates posts from those sources into your WordPress posts table, where they can be displayed by your WordPress templates like any other post — but with additional meta-data about the source of each syndicated post, so that your templates can properly attribute the post to its source.