Here are some sites that provide links to syndicated progressive content:

• Myantiwar.org features a very helpful directory of RSS feeds with descriptions and links
• Neravt.com/left/ features a huge directory of leftist websites including many blogs and alternative news sources
• Politicalwire.com/southpaws/ is a news aggregator website that pulls headlines from RSS feeds all over the web
• Liberal Oasis (where the left is right and the right is wrong!) features a long list of links including blogs and alternative news sources; has its own syndicated content

Myantiwar.org is the only one of these resources that provides a straight-up index of progressive RSS feeds but the other websites should be very helpful for you in locating online sources for progressive information.