Merging multiple RSS feeds into one

Create a single XML feed from sources (like Blogger, WordPress, Flickr, Twitter, Jaiku) and then syndicate the entire content as one FeedBurner feed.

Feedburner doesn’t give this merging feature which is now given by Yahoo pipes.Combine both of them and get your desired result

Here is a step by step guide given by Amit at Digital Inspiration

Step 1: Go to the Yahoo! Pipes website and Create a new Yahoo! Pipe here.

Step 2: Drag-n-drop the “Fetch Feed” tab from the Sources tab to the main drawing panel.

Step 3: Add all the different Feed URLs in the same Fetch Feed Module (click the plus icon).

Step 4: Once you are done adding all your RSS feeds, drag the lower circle from Feed Fetch module to the Pipe Output at the bottom.

Step 5: Give some name and save this Yahoo! Pipe. Now run the pipe and you will see a new RSS feed – syndicate that feed via FeedBurner so you can even track the feed subscribers. It’s all very simple