I've used Bloglines too, mainly for the convenience of being able to access RSS links across multiple computers--but eventually became frustrated that it, like other web based aggregators, was slower and clunkier than a locally installed app. So I dropped it, and have since been much happier with Sharpreader (though there are lots of other apps); the inconvenience of exporting feeds via OPML file to install on other machines hasn't been that big a deal.