Update: I was relying on a cookie which only showed up under certain circumstances. This is fixed now, but accounts will show up multiple times in Firesheep. I will fix this soon.
Firesheep is a great tool to show 'normal' people how important it is to know how to surf securely. For that reason, I just created some simple Firesheep handlers for the German social networks from VZnet. You can find them at Github and then just import them into Firesheep or grab the latest version of them right here:
And remember: With great power comes great responsibility. Don't be evil.