http://twitter-rss.com/ (now redirecting to google.com)
However these solutions are still shady and let no control to the user about
-who collects informations about the visited user timelines.
+who collects the information about the visited user timelines.
This is why Tweeper[1] was born, as an Open Source way to keep following your
friends with a certain degree of anonymity, without having to tell Twitter.com