LinknSurf offers to carry your favorite websites on your mobile. As they use rss technology this is obviously limited to sites that offer rss functionality. Currently MySpace, Xanga, LiveJournal, MSN Spaces, Blogspot, TextAmerica and some more are supported. How ? "Link'n'Surf is currently available for all Java midp2.0 phones. LinknSurf provides a list of supported phones.
I believe that in today's world with Web 2.0, having to use software is a mistake. Instead we should look at the solution Google offers to read their RSS reader on you cellphone, just as you can read your Gmail on your cell.