Am I the only geek who just doesn't get xkcd? I mean it's clever and all, but I've never been able to see why so many people have become so attached to it (and post every issue to reddit and news.yc).
Yes we all have RSS readers, but I was happy the first time somebody posted an xkcd comic on Digg (back when I used it) because I didn't have that feed in my reader yet. I'm willing to accept multiple exposures on behalf of the guy who is having his first exposure right now.
This allows for unpredictable, spontaneous meet ups of like minded folks.