Sage

I read from toni's blog about Sage, a feed reader for Firefox. I tried and now use it. Just click `Install Sage` on its site --of course, you use Firefox browser-- then it should run the-wizard, next-next-...-finish :-)
Alt+S will show you sage-sidebar. Browsing to your favorite sites/blogs, bookmark it on Sage Feeds, import OPML from feed-reader-you-used-before or add manually.