Now let's just quickly get this out of the way because I know otherwise some dumbass cuddlefish are going to mention it:
-This is a joke about wikipedia. It is not a joke about the Kindle. The kindle serves only as a device to access wikipedia; the joke is that if you have portable access to wikipedia anywhere then you have enough information to survive on, and so it is just like having the Hitchhikers' Guide with you. For proof of this, reread the alt-text. The joke is "wikipedia is incredibly useful!"
-There is nothing wrong with a joke about wikipedia per se. It is not a forbidden topic, and as I have stated before, there are lots of good examples of wikipedia humor, including wikipedia itself. But if xkcd is just going to be a repository of cartoons about wikipedia, that's dumb. That's really dumb, and I'm going to call him on it. This has nothing to do with whether or not xkcd is a "niche comic" or whether it's supposed to be a "nerd comic." Nerd comic ≠ wikipedia comic.
Alright Randall. You want to do this? Fine. Let's do this. Bring me all the wikipedia shit you have. I'm ready. It is on.
Unrelatedly: It would be unfair of me to critique xkcd as I do and not point out this week's Subnormality. I thought last week's was long - clearly that was just some kind of very wordy appetizer. Also, this comic, while it does play a little with spacial relationships at the end there, has barely any art and certainly is not supposed to be funny. So, let this be a warning to you, Winston Rowntree! Your thought-provoking morality tales have no place on the "Comic" part of your personal website!