We'll build robots, fly node copters and perhaps inadvertently kickstart the robot apocalypse.
All you need is a laptop. The NodeBots of London Esoteric Hardware Library stands ready to provide for your hardware needs on the day but if you are a beginner you may wish to pick up an Arduino Starter Kit to continue hacking at home.
Otherwise if you have a project, bring it along to get help and feedback on your idea.
Soldering irons, dremels and other tools are available for you to use.
If you are a beginner, try the nodebot-workshop - it will give you a feel for hardware programming without needing access to any actual hardware.