I would imagine that a lot of us geeks at xkcd are iphone and android users who access the forums from our devices. iPhones get an awesome app called 'Forums' that parses vbulletin and phpbb forums flawlessly and renders them for the iPhone, but Android hasn't gotten one yet. There's a program called Tapatalk
for both Android and iPhone that renders forums of any format for portable devices, and also allows for things like checking your pm's, seeing who is currently browsing, viewing your posts and your profile and whatnot, but it requires a small server-side plugin to be installed.
Anyway, it'd be really cool if xkcd made this available, maybe I'm not the only one browsing the forums from the android browser with a
on my face