I’ve been using Bloglines for some time now.
It’s the most useful and inovative online feed reader that I could find. When I did my test, the only real contestants were Google Reader, Rojo, Newsgator and Feedlounge (paid, but with a 24 hour trial). They were not even close to Bloglines in my opinion.
I would recommend it to everyone. Before I used Bloglines, I monitored about 10-15 websites/news sources, which I had in my Firefox quick bookmarks location.
If someone wants my reading sources (91 at the moment, but you can see them updated in real time, at Bloglines), here they are, as an archived OPML feed (just import them after you create your account at Bloglines).