Convenience is one of the general features of the new WordPress 2.+ versions. Adding stuff to your sidebar has never been easier. Add-ons that had been handled by external plugins in the earlier versions of WordPress are now built-in. They can also be added into your sidebar through drag and drop.
One of these built-in drag and drop features is the RSS feed widget. I’ve just added it myself on the second sidebar, which now features an RSS feed of my Top 10 EntreCard Droppers.
If your WordPress installation is at version 2 and up, you should be able to see the RSS widget when you click on Design > Widgets on your WordPress administration screen.
Once you’ve added it to the sidebar of your choice, you can then edit the widget to show the RSS feed that you would like to appear on your sidebar, in my case it looks like this:
When you’ve entered the necessary data, click on “Change” and then “Save Changes”. When you go to the front end (homepage) of your site, you should be able to see something similar to what I have under the Communities Badges on this site.
You can have more than one RSS feed on your sidebar, just keep dragging that RSS widget into the spot where you want them to appear and presto!