I'm looking for high volumes of content that can be problematically pulled into my site. So far I've looked at http://marketbrief.com/content, http://www.textbroker.com/us/client-api.php, and http://api.ezinearticles.com/

Besides paying $2600/month for an AP news feed (500 articles/day), what other services can I look at for ingesting high volumes of content (completely automated)?

Thanks!
Jason