I like xkcd, but the recent string of xkcd submissions is a bit excessive.
Xkcd is the best comic out there. It doesn't seem like a flaw in the naive implementation of social news that one or two good comics are on the front page of news.yc sometimes.
And there's nothing to talk about. "Haha yeah that's so true! Um... ok I'm going to go back to work now but not before voting this up because it made me laugh"
Personally I can't figure out why people keep up-voting xkcd submissions.
I don't see what the problem is. As one of the best comics of all time, it seems perfectly reasonable for xkcd to have earned a permanent spot on the front page.