I noticed the RSS Reader feature on my iPad after I upgraded to iOS 5. When Im reading a web page, the word Reader shows up in the URL bar. When I tap it, the iPad looks a lot more like a kindle. The coloured backgrounds drop off, fonts are ignored, ads go away, and I get a basic black text on white background. Much more readable.
Obviously the RSS feed doesnt include YouTube videos, and a bunch of other parts of the page. But it also doesn't include the ads! Some sites don't have an RSS version, so you don't get it. But where they do have it, it's so much nicer.
Like many people, I upgraded to iOS 5 on my iDevices very soon after it came out. I noticed that Location Services has a lot more options than previously. What is interesting is that they have made the icon for Location Services in the status bar off by default, and they buried the option to enable it. Once you enable it, you'll discover lots and lots of services looking at your current location. I find this a bit too much of an invasion of privacy. Here's how to tone it down some.