Newshutch
I have been trying to figure out why I like the web-based aggregator Newshutch so very much. It is a lot like Bloglines, but for some reason I find it easier to read. I think at least part of it is the fact that the screen is much less static with items marked "read" in a visual way where they disappear from the screen. I think it is also the Web 2.0 feel of the site, something that is missing in the current Bloglines. But tops for me is that it recognizes all of my feeds, no matter what the format. Very nice.
I might still recommend Bloglines for starting out, but for people who already have a list of feeds they follow, this is a nice step up in Web 2.0 functionality.