I'll just give you in brief my opinions about Bloglines. Obviously, I haven't heard about it before and this means another new tool for my blogging experience. I can say that it's nice to have all my peers' post under control so that I don't need to open each blog to know what's new inside.
Furthermore, feeds are useful when one wants to be updated for example on BBC news, so that clicking on the RSS of the news site you can achieve your purpose.
In the end, I would say that a feed aggregator is a good mean which allows us to spend less time on the net when we have to comment on our peers' blogs and, at the same time, it's effective from the point of view of updated information it gives us.
