What and where is the feed icon?
If the page you are on has anything that you can subscribe to on it, the feed icon will be on the left under the menus.
All podcast channel pages have a feed icon. You might notice some pages that are not podcast channels also have the feed icon. That is because RSS is also used for subscribing to news, video, and many other types of syndicated content. You do not use a podcatcher for news or text related subscriptions, rather a feed agregator is used. Many browsers such as Firefox and Internet Explorer 7 now have feed agregators built-in.