The is a feed for every story:
and feeds for stories in the sections e.g.
but no feed that contains stories that only appear on the front page.
e.g on slashdot I would expect there to be a feed:
The reason I want this is so that I can subscribe to only the subset of sections that I'm interested in. e.g. everything but Politics.
( Incidentally, I noticed that there's no separate RSS feed for the Slashback section on slashdot.org but I don't know who to complain about that too :/ )