Is there any way that I can subscribe to HWN (preferably as RSS/Atom), and
not other stuff that doesn't interest me?
At this time, no, unless someone would like to step up and volunteer scraping the news and auto-pasting it into some RSS-enabled web journal.
As editor, I can assure you that the news will always have the subject "Haskell Weekly News" and will always be published on the low-volume haskell@ list, so setting your email filters is the best bet for now.
p.s. Is Tumblr a possibility? If anyone has any experience with it, please email me. I might try out their post by email feature here: