Actually this is a perfect solution for sites and blogs that don't provide you with the option to subscribe them by Email. Sure you can take every RSS Feed and place it on your desirable RSS Reader but there are lots of people that still prefer to get updates in a familiar Internet application - their Email.
Unlike FeedBlitz and FeedBurner, you'll get update right after some one post on his site/blog and not just ones a day. That way you can assure your self to get the news that you like, the way that you like - faster and easier.
You can also perform a search by tags - RssFwd Popular Feed