1. Create a RSS widget tile and read the feed in the center box. Copy & Paste the RSS feeds URL into the tile creator and it will automatically detect it as newssource. The RSS symbol will be in the top left corner of that tile. Click on the tile and the RSS feed will appear in the center box.
2. Create a RSS webmix with 3x3 tiles. Add a new webmix to your Symbaloo and choose RSS feeds under webmix use. Copy & Paste the RSS feeds URL into the tile creator and drag the created tile into the webmix. A 3x3 tile with your RSS feed is created.
To learn more about RSS feeds in Symbaloo, watch this tutorial: