I was recently looking for one of these and found feed43.com. It's a lot more complicated so it probably doesn't attract the casual user but it is very useful. you can apply a template to your feeds and pick out as many parameters as you need and then sort them in what ever way you would like them to appear. Only problem is, it seems to be down often enough. I would use feedity's service if it was similar. At the moment, only offering a link and title - it doesn't suit me needs.