It seems like there have been several independent implementations of RSS done here. But I know almost nothing about any of them. Luckily, however, I have special access that I'll describe for you:

There's a link labeled "Need Help??" just above your nodelets (unless you turned off "hints", if so, shame on you, see user settings). Where that takes you has a search field. Entering "RSS" gives a mere two site help documents. The first could use one tiny update because it has a link labeled "Newest Nodes" that does not go to Newest Nodes and thus could easily convince somebody of things that are very much not true. I'd update it myself but the help text appears meant to be parsed and there are dire warnings about breaking it, so I will have asked nicely for somebody else to do that. (Update now applied there.)

I'm not going to link to those documents as it seems that many visitors could use the trivial practice with looking up site documentation.

Thanks for mentioning RSS, Tanktalus. The implementation looks like it is smart enough to be efficient, unlike reloading Newest Nodes over and over when you aren't looking at it (sadly, though, "there is not much to do about regular reloads", so I guess erix is powerless on that front, or something, for some reason).