Flitic is simply a feed folksonomy…instead of bookmarking normal webpages, you bookmark feed URL’s.
They seriously need to think about enabling OPML support so each tag can be a Reading List…del.icio.us has been hacked this way.
RSSor seems to be a more advanced feed folksonomy as you can also read feed contents like an RSS Reader, but still lacks OPML to enable instant Reading Lists.
H20 Playlist could be used as a feed folksonomy which generates OPML but it isn’t this type of service.
I thought by now we would have more feed folksonomies, there are so many bookmark folksonomies…
Next we need a folksonomy where people submit Reading Lists, which can be tagged.
[ADDED 12/04/06: aggRSSive]