I have taken to using Google Reader to syndicate mailing lists and blog posts. Can I use it for SourceForge mailing lists like the following: http://sourceforge.net/mailarchive/forum.php?forum_name=scikit-learn-general
The link you specified is not a feed and cannot be used with Google Reader.
The simplest test is to add this URL with the Subscribe button in Google Reader. Google Reader fails to find any feed.