No. It's the same as on the HN frontpage: article title, link to the article, and link to the comments. This is what a feed item looks like in Google Reader (GR): http://i.imgur.com/Imyw9.png

GR's search functionality is pretty useful. I sometimes mark articles I upvote here on HN in GR, too, so I can search through them in the future, if I need to. I don't know for how long GR saves fetched articles of a specific feed, but if you mark them, they'll stay there forever. At least I hope so.