I set up a Yahoo Pipe a while ago for comments (which pulls in each article's URL with comments), but lately all URLs have become unclickable (except for article title). I'm not sure if that was done by HN or Yahoo. Anyway:
Actually, links work now for some reason. I personally really like this format because it lets me see comments right via RSS. The only problem is that Yahoo then tends to cache them, and so if I want to see the _latest_ comments, I must visit the actual article permalink.