A bug in c2s causes the registration to fail and crash because a variable "username" is accessed that doesn't exit. This one line patch should fix it.
Variable username doesn't exist
This pull request can be ignored since #52 includes this fix.
I see you're located in Berlin. Will I be meeting you at 28C3 next tuesday?
Unfortunately, this year I'll only have time to be there on Thursday.
Great! I hope you'll get a day ticket.
I hope being there extra early helps :-)