If you are making something that would make sense to include an rss feed, please include an rss feed.
Rss is great!
Edit: It is a standard useful format for a common purpose/use.
You know every irritating thing that some websites with their own dashboard feed system thing do, like rearranging the order of things, or only showing the things that /they/ think are important, and ignoring user stated preferences?
With rss you don't have those problems.
Rss respects user choice.
It allows users to follow their stated preferences, instead of what the website thinks are their revealed preferences.
Mostly, my appetite for news has changed, in that I went from passively consuming news to seeking out particular sites and reading more articles -- and also, because of HN, I discover more news than I could organically follow through RSS on my own.
Easy enough to code the feeds - if someone has a need for it, why not.
If nothing else, the rss feed could just include the link to the full post (and not the post content), which is useful in that it prompts the user to view one's page, I think.