GUUUI points us to a summary on card sorting tools. I haven’t read it properly yet but I’m already biased towards WebSort as it allows you to do your card sorts over the web. I’m a big fan of pen and paper and while software definately will make saving your data in a decent format (and not just a desk drawer) a lot easier, I really just need a simple way of not having to met in person with the card sorting crew.
I’ve mentioned this before, but never got round to do an actual search on the subject. I imagine a video conference in combination with an online card sorting tool could prove quite useful (ok, so I got an iSight some time ago and still need to find something useful to use it for).