Consider one feed like this: http://feeds.feedburner.com/codinghorror

It has the entire content inside the description tag of the feed, so you don't need to access the website to read the post.

Now I have the problem of creating an interface for a feed like this on a desktop client. What's the best way to render the text in a pleasant way to the user? My first thought was to parse the entire HTML as if I was a web browser, but that looks really hard to do in a satisfying way. Are there any better (faster) alternatives?

Rephrasing: how a desktop rss client such as feeddamon parses the input to display it nicely? Does it have a web browser inside it?