I've been a big fan of Bloglines since it allowed me universal access just about everywhere I went. But now I have a new love. I've been using reBlog for a while now, but not really to repost content from elsewhere (which is what it is intended for), but as a RSS aggregator and reader.
Bloglines has the ability to list your blogroll which reBlog does not have (maybe someday), but reBlog has the ability to let you edit, tag, and repost blog posts from your feed. Granted reBlog does require you install stuff and can be a little hairy, but there is a nice plug in that works with Movable Type that make reBlogging posts a piece of cake.
The cool part is that I can keep my Bloglines account for my blogroll and just keep using reBlog as my primary feed reader. I'm going to have to prune the Bloglines list down a little as I just don't read all of the blogs listed there anymore. This is in an effort to, you know, go outside and see the world once in a while.